Relevant bibliographies by topics / Alkaline water electrolysis

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Academic literature on the topic 'Alkaline water electrolysis'

Author: Grafiati
Published: 19 February 2023
Last updated: 12 June 2025

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Journal articles on the topic "Alkaline water electrolysis"

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Denk, Karel, Martin Paidar, Jaromir Hnat, and Karel Bouzek. "Potential of Membrane Alkaline Water Electrolysis in Connection with Renewable Power Sources." ECS Meeting Abstracts MA2022-01, no. 26 (2022): 1225. http://dx.doi.org/10.1149/ma2022-01261225mtgabs.

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Hydrogen is an efficient energy carrier with numerous applications in various areas as industry, energetics, and transport. Its potential depends also on the origin of the energy used to produce the hydrogen with respect to its environmental impact. Where the standard production of hydrogen from fossil fuels (methane steam reforming, etc.) doesn’t bring any benefit to decarbonisation of society. The most ecological approach involves water electrolysis using ‘green’ electricity, such as renewable power sources. Such hydrogen thus stores energy which can be used later. Hydrogen, used in the transport sector, can minimize its environmental impact together with preserving the driving range and decrease the recharge/refill time in comparison with a pure battery-powered vehicle. For transportation the hydrogen filling stations network is required. Local production of hydrogen is one of proposed scenarios. The combination of electrolyser and renewable power source is the most viable local source of hydrogen. It is important to know the possible amount of hydrogen produced with respect to local environmental and economic conditions. Hydrogen production by water electrolysis is an extensively studied topic. Among the three most prominent types, which are the alkaline water electrolysis (AWE), proton-exchange membrane (PEM) electrolysis and high-temperature solid-oxide electrolysis, AWE is the technology which is widely used in the industry for the longest time. In the recent development, AWE is being modified by incorporation of anion-selective membranes (ASMs) to replace the diaphragm used as the cell separator. In comparison with the diaphragm, ASMs perform acceptably in environment with lower temperatures and lower concentrations of the liquid electrolyte, thus, allowing for very flexible operation similarly to the PEM electrolysers. On the other hand, ASMs are not yet in a development level where they could outperform the diaphragm and PEM in long-term stability. Renewable sources of energy, predominantly photovoltaic (PV) plants and wind turbines, operate with non-stable output of electricity. Considering their proposed connection to the water electrolysis, flexibility of such electrolyser is of the essence for maximizing hydrogen production. The aim of this work is to consider a connection of a PV plant with an AWE. Power output data from a real PV plant are taken as a source of electricity for a model AWE. The input data for the electrolyser were taken from a laboratory AWE. The AWE data were measured using a single-cell electrolyser using Zirfon Perl® cell separator with nickel-foam electrodes. Operation including ion-selective membranes was also taken into consideration. Data from literature were used to set possible operation range and other electrolyser parameters. Small-scale operation was then upscaled to match dimensions of a real AWE operation. Using the before mentioned data, a hydrogen production model was made. The model takes the power output of the PV plant in time and decides whether to use the power for preheating of the electrolyser or for electrolytic hydrogen production. Temperature of the electrolyser is influenced by the preheating, thermal-energy loss of the electrolytic reactions, or cooling to maintain optimal conditions. The advantage of the created model is its variability for both energy output of the power plant or other instable power source and the properties of the electrolyser. It can be used to predict hydrogen production in time with respect to the electrolyser and PV power plant size. The difference between standard AWE and AWE with ion exchange membrane is mainly shown during start-up time where membrane based electrolyser shows better efficiency. Frequency of start-stop operation modes thus influences the choice of suitable electrolyser type. Another output is to optimize design of an electrolyser to fit the scale of an existing plant from economical point of view. This knowledge is an important input into the plan which is set to introduce hydrogen-powered transport options where fossil-fuel powered vehicles is often the only option, such as unelectrified low-traffic railroad networks. Acknowledgment: This project is financed by the Technology Agency of the Czech Republic under grant TO01000324, in the frame of the KAPPA programme, with funding from EEA Grants and Norway Grants.
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Marini, Stefania, Paolo Salvi, Paolo Nelli, et al. "Advanced alkaline water electrolysis." Electrochimica Acta 82 (November 2012): 384–91. http://dx.doi.org/10.1016/j.electacta.2012.05.011.

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Guo, Hao, Hyeon-Jung Kim, and Sang-Young Kim. "Research on Hydrogen Production by Water Electrolysis Using a Rotating Magnetic Field." Energies 16, no. 1 (2022): 86. http://dx.doi.org/10.3390/en16010086.

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In this paper, the effect of rotating magnetic fields on hydrogen generation from water electrolysis is analyzed, aiming to provide a research reference for hydrogen production and improving hydrogen production efficiency. The electrolytic environment is formed by alkaline solutions and special electrolytic cells. The two electrolytic cells are connected to each other in the form of several pipes. The ring magnets are used to surround the pipes and rotate the magnets so that the pipes move relative to the magnets within the ring magnetic field area. Experimentally, the electrolysis reaction of an alkaline solution was studied by using a rotating magnetic field, and the effect of magnetic field rotation speed on the electrolysis reaction was analyzed using detected voltage data. The experimental phenomenon showed that the faster the rotation speed of the rotating magnetic field, the faster the production speed of hydrogen gas.
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Hall, D. E. "Alkaline Water Electrolysis Anode Materials." Journal of The Electrochemical Society 132, no. 2 (1985): 41C—48C. http://dx.doi.org/10.1149/1.2113856.

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Manabe, Akiyoshi, Terumi Hashimoto, and Masaharu Kashiwase. "Study of Alkaline Water Electrolysis." ECS Transactions 41, no. 31 (2019): 1–7. http://dx.doi.org/10.1149/1.3702851.

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Shah, Parin, Mengjie Chen, Katelyn Groenhout, Hui Min Tee, Habin Park, and Paul Kohl. "Self-Adhesive Ionomers for Durable Alkaline Water Electrolysis." ECS Meeting Abstracts MA2022-02, no. 41 (2022): 1520. http://dx.doi.org/10.1149/ma2022-02411520mtgabs.

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Low-temperature water electrolysis using anion conductive polymer electrolytes has several potential advantages over acid-based polymer electrolyzers. However, the formation of durable, high surface area electrodes remains a challenge. In particular, the adhesion and connectivity of high surface area, particulate catalysts to the porous transport layer is critically important to the long-term cell lifetime. In this study, a family of covalently bonded, self-adherent, hydroxide conducting ionomers has been synthesized and tested under alkaline electrolysis conditions. The ionomers are based on hydroxide conducting poly(norbornene) polymers used in fuel cell and electrolyzers. Ionomers used in electrolysis electrodes, especially at the oxygen gas producing anode, must provide adhesion between the catalyst particles, porous transport layer and solid polymer membrane. Simple mixtures of ionomer and catalyst can suffer from poor catalyst adhesion because only physical adhesion is used to bind the components together. The terpolymer and tetrapolymer ionomers used in this work have been functionalized to provide cites for chemical bonding of bis(phenyl)-A-diglycidyl ether to the ionomer, catalyst, and porous transport layer. The resulting electrodes show excellent adhesion of the catalyst particles to the porous transport layer, as determined by adhesion measurements. Electrolyzer results show stable voltage performance over long periods of time.
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Sulaiman, N. S., N. I. Khalid, E. M. H. Fauzi, et al. "Revamp of existing lab-scale electrolytic cell design for electrolyzed water study in cleaning application." Supplementary 6 4, S6 (2020): 146–49. http://dx.doi.org/10.26656/fr.2017.4(s6).040.

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The lab-scale electrolytic cell was designed to produce acidic and alkaline electrolyzed water for cleaning study. Electrolyzed water (EW) was produced by electrolysis of a dilute sodium chloride solution. The generation of free chlorine, pH and oxidation-reduction potential from the electrolysis process by the electrolytic cell were far from the expected value. Thus, the lab-scale electrolytic cell was revamped by using the acrylic slot to hold the electrode plate and a membrane holder without metal screws. This revamp work is to reduce the resistance for current flow with the aim to increase the value of chemical properties (pH, oxidation-reduction potential, free chlorine) for acidic and alkaline electrolyzed water. Findings have shown that the current was increased from 0.013A to 2.5A after the revamp process. As a result of the revamp, the value of pH, oxidationreduction potential and free chlorine for acidic electrolyzed water was increased by 1.7 times, 2.7 times, and 20 times higher than previous results respectively. While for alkaline electrolyzed water, the value of pH and oxidation-reduction potential was increased by 1.4 times and 6.2 times higher than previous results respectively.
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Santos, Diogo M. F., César A. C. Sequeira, and José L. Figueiredo. "Hydrogen production by alkaline water electrolysis." Química Nova 36, no. 8 (2013): 1176–93. http://dx.doi.org/10.1590/s0100-40422013000800017.

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Manabe, A., T. Hashimoto, M. Kashiwase, et al. "Study of Alkaline Water Electrolysis (II)." ECS Transactions 50, no. 49 (2013): 87–94. http://dx.doi.org/10.1149/05049.0087ecst.

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Manabe, A., M. Kashiwase, T. Hashimoto, et al. "Basic study of alkaline water electrolysis." Electrochimica Acta 100 (June 2013): 249–56. http://dx.doi.org/10.1016/j.electacta.2012.12.105.

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Dissertations / Theses on the topic "Alkaline water electrolysis"

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Stemp, Michael C. "Homogeneous catalysis in alkaline water electrolysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0019/MQ45844.pdf.

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Lumanauw, Daniel. "Hydrogen bubble characterization in alkaline water electrolysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0017/MQ54129.pdf.

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Fiorentini, Diego. "Development of a polymeric diaphragm for Alkaline Water Electrolysis." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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The importance of new technologies capable of providing clean energy is one of the most difficult and important challenge that science has to take up. The discovery of new green processes or the development of those already in use are common goals, which can partially solve the current climatic problems. The aim of this thesis is to extend the GVS portfolio with a polymeric separator able to improving the performances of alkaline water electrolysis (AWE) currently in use, as an alternative to separators produced by competitors. The separator consists of a membrane made of a high temperature resistant and chemically inert techno-polymer and an Inorganic filler. Once the new polymer had been studied to see how it affects the properties of the membrane and the basic information had been obtained, the influence of all the parameters in the preparation of the casting solution and the production process were analyzed. In addition, the most appropriate substrate and production method for the separator were investigated and selected in order to produce the best performing membrane possible. Once the best separator was produced, it was possible to compare it with those produced by competitors, achieving better results in most of the analyses carried out. The prototypes were sent to companies producing cells for the Alkaline Water Electrolysis in order to validate the results obtained internally and carry out stability analyses inside the cells. The next steps after this study will be to industrialize the process developed on a laboratory scale in order to obtain a product that will benefit both the manufacturer and the environment.
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Law, Joseph. "The role of vanadium as a homogeneous catalyst in alkaline water electrolysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0020/MQ54216.pdf.

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Haug, Philipp [Verfasser]. "Experimental and theoretical investigation of gas purity in alkaline water electrolysis / Philipp Haug." München : Verlag Dr. Hut, 2019. http://d-nb.info/1181514061/34.

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Zhang, Zhihao. "The Development of Three Dimensional Porous Nickel Materials and their Catalytic Performance towards Oxygen Evolution Reaction in Alkaline Media." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40636.

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As the global energy crisis and environmental pollution problem continues, there is an increasing demand for clean and sustainable energy storage and conversion technologies, such as water-splitting electrolysis. Water electrolysis is a process of running an electrical current through water in separating the hydrogen and oxygen. Oxygen evolution reaction (OER) is a key reaction in this electrochemical process, and the electrochemical performance of these systems is usually hindered by the slow OER reaction kinetics. In order to achieve high energy conversion efficiency, the development of efficient OER catalysts is the key. To achieve that, abundant research is done by using noble metal oxides as catalyst, such as IrO2 and RuO2. However, considering their high cost, a cheap earth-abundant material with a high OER catalytic activity is required. Accordingly, this study has been focused on the synthesis of three dimensional porous structured Ni-based OER catalysts. First, a 3D porous Ni meso-foam was developed through a facile high-temperature one-pot synthesis method, and its catalytic activity towards OER was explored. Specifically, the as-synthesized Ni meso-foam material, referred to as raw NMF, has a wire-linked structure and high surface area. A reduction procedure was introduced to obtain reduced Ni meso-foam materials, referred to as NMF-H2. It was also oxidized in air at 600 ℃ to form a semi-hollow NiO crosslinking phase and subsequently reduced in H2 at 300℃, forming a regenerated porous Ni foam material, referred to as NMF-O2/H2. The composition and morphology of all materials were investigated by XRD and SEM, respectively. The SEM image reveals that, in the porous NMF-O2/H2, the cross-linked meso-wire structure was maintained, and the average pore size is between 0.5-5 μm. Electrochemical analysis show that the OER activity of the Ni foam catalysts follows NMF-O2/H2 > NMF-H2 > raw NMF. In addition to the NMF-based materials, a Ni/Ni(OH)2 layer-structured electrocatalyst, referred to as NiDHBT, was also developed using a dynamic hydrogen bubble templating (DHBT) method. First, the 3D-porous micro Ni/Zn nanoplatelets were constructed in a two-step DHBT deposition method. The Ni/Zn foil was used as a scaffold, featured with the open porous structure and high surface area, for the subsequent electrodeposition of Ni(OH)2. Then, the Zn was etched from the as-prepared Ni/Zn/Ni(OH)2 nanocomposite to obtain the NiDHBT. The catalytic performance of the NiDHBT toward OER reaction was evaluated, and the optimal catalysts developed from different electro deposition potentials were determined. On the recognition of the high catalytic activity of NMF-O2/H2 and NiDHBT, porous structured FeOx-Nickel meso-foam, referred to as Fe@NMF-O2/H2, and FeOx- Ni/Ni(OH)2 layered-structure materials, referred to as Fe@NiDHBT, was further developed to explore the benefits of FeOx deposition for its OER catalytic performance. The deposition of FeOx is achieved by physical mixing FeOx colloid with NMF-O2/H2 and NiDHBT, and the electrochemical performance of these materials was examined in 1 M KOH. Among the developed materials, the best performing catalyst is Fe@NiDHBT synthesized by loading FeOx colloid onto the NiDHBT support. The overpotential for Fe@NiDHBT to reach 10 mA·cm-2 is 247mV, and the corresponding Tafel slope is 48.10mV·dec-1. Therefore, it was concluded that the FeOx¬¬ loading modification is an effective strategy to improve the OER activity of Ni foam-based catalysts.
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Jia, Jingshu. "Fabrication of high quality one material anode and cathode for water electrolysis in alkaline solution /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202008%20JIA.

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Haug, Philipp [Verfasser], and Thomas [Akademischer Betreuer] Turek. "Experimental and theoretical investigation of gas purity in alkaline water electrolysis / Philipp Haug ; Betreuer: Thomas Turek." Clausthal-Zellerfeld : Technische Universität Clausthal, 2019. http://d-nb.info/1231363312/34.

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Jiang, Tao. "Development of Alkaline Electrolyzer Electrodes and Their Characterization in Overall Water Splitting." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCA006.

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La décomposition électrolytique de l’eau en hydrogène et oxygène à l’aide d’électricité renouvelable générée par les courants marins ou à partir d’énergie éolienne ou solaire, constitue l’une des voies les plus propres et directes pour produire de l’hydrogène. Toutefois, la production de grands volumes d’hydrogène par décomposition électrolytique de l’eau comporte un verrou technologique qui réside dans la forte surtension à vaincre à l’anode où de l’oxygène est dégagé. Ce travail de thèse s’est attaché donc à mettre au point des matériaux d’électrodes capables de catalyser de l’eau en oxygène de façon efficace et stable, en utilisant des éléments chimiques suffisamment abondants sur terre. Pour cela nous avons exploré des composés présentant des porosités à structures hiérarchiques et des procédés de préparation efficaces, aisées à mettre en œuvre et susceptibles d’un usage à l’échelle industrielle. Nous avons développé deux types d’électrocatalyseurs d’oxydation de l’eau en oxygène en mettant au point deux voies de préparation impliquant chacune une phase d’activation in situ. Le premier type est une mousse de nickel dopée à la fois avec des cristaux de nickel, des nanoparticules de tétroxyde de tricobalt et des nanofeuilles d’oxyde de graphène via nickelage électrolytique, suivi d’une activation électrochimique in situ pour former de l’hydroxyde de nickel et des nano-plaques d’oxy-hydroxyde du même métal. Ce catalyseur hybride s’est avéré avoir des performances électrocatalytiques de bon niveau, comparables à celles des électrodes à base de métaux nobles qui sont disponibles dans l’état actuel de la technique ; il a en outre fait preuve d’une excellente stabilité en fonctionnement. Ces propriétés remarquables semblent liées à la fois aux dépôts formés sur la mousse de nickel par les différentes phases actives citées, aux nanoparticules d’oxy-hydroxyde de nickel, ainsi qu’aux effets de synergie qu’elles y induisent. Le second type d’électrocatalyseurs a été obtenu en combinant la projection thermique (HVOF) et un processus d’activation chimique puis électrochimique. Le matériau résultant possède de nanocouches du type jamborite formée in situ, sur la matrice poreuse à structure hiérarchique. Le catalyseur développé dans ce travail présente non seulement une surtension et une pente de Tafel exceptionnellement faibles, mais également une stabilité remarquable. Ces performances sont dues à un puissant effet de synergie dans laquelle interviennent la grande activité intrinsèque des nanofeuilles de jamborite et la grande rapidité des transports d’électrons et d’ions assurée par l'architecture poreuse hiérarchique. Il convient de noter que cette nouvelle méthodologie a le potentiel de produire des électrodes de grandes tailles apte à l’électrolyse alcaline de l'eau et crée ainsi de nouvelles perspectives dans le cadre de la conception d'électrocatalyseurs à la fois très actifs et stables. Nous avons également développé, initialement, des électrocatalyseurs destinés à la réduction de l’eau en hydrogène, qui impliquent également une activation électrochimique in situ. Ces électrodes peuvent être ainsi couplées aux électrodes précitées d’oxydation de l’eau en oxygène pour former des cellules électrochimiques complètes à deux électrodes, dont les performances rivalisent avec celles développées par le couple dioxyde de ruthénium/platine qui représente le meilleur état de la technique dans le cadre de la production d’hydrogène et d’oxygène par électrolyse de l’eau. En résumé, en combinant des techniques conventionnelles de revêtement et d’activation électrochimique in situ, ce travail a permis de développer une méthodologie de préparation d'électrodes catalytiques offrant de hautes performances et susceptibles de commercialisation. La technique d’activation électrochimique in situ exploite un comportement d'auto-optimisation dynamique qui est aisé à mettre en œuvre, facilement adaptable, efficace et respectueux de l'environnement<br>Splitting water into hydrogen and oxygen by electrolysis using electricity from intermittent ocean current, wind, or solar energies is one of the easiest and cleanest routes for high-purity hydrogen production and an effective way to store the excess electrical power without leaving any carbon footprints. The key dilemma for efficient large-scale production of hydrogen by splitting of water via the hydrogen and oxygen evolution reactions is the high overpotential required, especially for the oxygen evolution reaction. Hence, engineering highly active and stable earth-abundant oxygen evolution electrocatalysts with three-dimensional hierarchical porous architecture via facile, effective and commercial means is the main objective of the present PhD study. Finally, we developed two kinds of good performance oxygen evolution electrocatalysts through two different way combined with in situ electrochemical activation.For the first oxygen evolution electrocatalyst, we report a codoped nickel foam by nickel crystals, tricobalt tetroxide nanoparticles, graphene oxide nanosheets, and in situ generated nickel hydroxide and nickel oxyhydroxide nanoflakes via facile electrolytic codeposition in combination with in situ electrochemical activation as a promising electrocatalyst for oxygen evolution reaction. Notably, this hybrid catalyst shows good electrocatalytic performance, which is comparable to the state-of-the-art noble catalysts. The hybrid catalyst as an electrocatalytically-active and robust oxygen evolution electrocatalyst also exhibits strong long-term electrochemical durability. Such a remarkable performance can be benefiting from the introduced active materials deposited on nickel foam, in situ generated nickel oxyhydroxide nanoflakes and their synergistic effects. It could potentially be implemented in large-scale water electrolysis systems.For the second oxygen evolution electrocatalyst, a facile and efficient means of combining high-velocity oxy-fuel spraying followed by chemical activation, and in situ electrochemical activation based on oxygen evolution reaction has been developed to obtain a promising self-supported oxygen evolution electrocatalyst with lattice-distorted Jamborite nanosheets in situ generated on the three-dimensional hierarchical porous framework. The catalyst developed in this work exhibits not only exceptionally low overpotential and Tafel slope, but also remarkable stability. Such a remarkable feature of this catalyst lies in the synergistic effect of the high intrinsic activity arising from the lattice-dislocated Jamborite nanosheets as the highly active substance, and the accelerated electron/ion transport associated with the hierarchical porous architecture. Notably, this novel methodology has the potential to produce large-size-electrode for alkaline water electrolyzer, which can provide new dimensions in design of highly active and stable self-supported electrocatalysts.Furthermore, we have also initially developed good hydrogen evolution electrocatalysts upon in situ electrochemical activation, coupled with the obtained superior oxygen evolution electrocatalysts forming two-electrode configurations, respectively, both of which rivalled the integrated state-of-the-art ruthenium dioxide-platinum electrode in alkaline overall water splitting.In summary, a methodology of fabricating easy-to-commercial, high performance catalytic electrodes by combining general coating processes with in situ electrochemical activation has been realized and well developed. The in situ electrochemical activation mentioned above is a dynamic self-optimization behavior which is facile, flexible, effective and eco-friendly, as a strategy of fabricating self-supported electrodes for efficient and durable overall water splitting. We hope our work can promote advanced development toward large-scale hydrogen production using excess electrical power whenever and wherever available
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Fan, Kaicai. "Development of High Performance Electrocatalyst for Water Splitting Application." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/382229.

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With increasing global demand for energy, rapid depletion of fossil fuels and intensification of environmental concerns, exploring clean and sustainable energy carriers to replace fossil fuel is becoming critical. Among the various alternatives, hydrogen has been intensively regarded as a promising energy carrier to fulfill the increasing energy demand due to its large energy density per unit mass and eco-friendly production possibilities. However, hydrogen does not exist in molecular structure in nature, and it is essential to obtain efficient and sustainable H2 production technologies. Alkaline water electrolysis is an effective, clean and sustainable process to produce high-quality hydrogen. In this process, highly active electrocatalysts for the hydrogen evolution reaction (HER) are required to accelerate the sluggish kinetics and lower the overpotentials (η) for efficient hydrogen evolution. To date, a noble metal, platinum (Pt), is the state-of-art electrocatalyst for HER. However, exploration of alternative electrocatalysts with low cost and excellent electrocatalytic activity is of vital importance to realize large-scale hydrogen production through water electrolysis. Generally, an electrochemically active catalyst should have an optimal hydrogen adsorption free energy to allow efficient catalytic hydrogen adsorption/desorption. In alkaline solution, dissociation of water onto the electrocatalyst determines the overall HER efficiency. This thesis focuses on rational design and synthesis of different earth-abundant electrocatalysts for electrocatalytic HER in alkaline media. Through facile anion or cation doping strategies, electrocatalysts with abundant accessible active sites, enhanced electronic conductivity and accelerated HER kinetics have been systematically fabricated, characterized and evaluated. First, an efficient HER electrocatalyst in alkaline media was fabricated by incorporating sulfur atoms into a cobalt (hydro)oxide crystal structure. The resultant catalyst exhibits a remarkably enhanced HER activity with a low-overpotential of 119 mV at 10 mA/cm2 and an excellent durability. The results suggest that cobalt hydroxide benefits water adsorption and cleavage, while the negatively charged sulfur ligands facilitate hydrogen adsorption and desorption on the surface of electrocatalysts, leading to significantly promoted Volmer and Heyrovsky steps for HER in alkaline media. Second, exploring bifunctional electrocatalysts which can simultaneously accelerate the HER and oxygen evolution reaction (OER) activities plays a key role in alkaline water splitting. Here, sulfur atoms were incorporated into the mixed transition metal hydroxide with high OER performance to render excellent HER activity. The enhanced catalytic activity towards HER was confirmed by a synergistic effect between the retained metal hydroxide host and the incorporated sulfur atoms. In addition, the full water splitting electrolyzer equipped with fabricated bifunctional electrocatalysts as anode and cathode materials exhibited remarkable overall water splitting performance comparable to that with benchmark Pt and RuO2 electrocatalysts. The S/Se co-doped Co3O4 nanosheets on carbon cloth were fabricated by a facile room temperature chalcogen atom incorporation methodology and were applied as the electrocatalyst for HER in alkaline media. The sulfur and selenium atoms were homogeneously distributed on the surface by forming Co-S or Co-Se bonds which play a key role in the structural change in electrochemical activation. The obtained electrocatalysts demonstrated remarkably improved HER activity compared to that of the original Co3O4. Finally, molybdenum doped cobalt hydroxide was fabricated with significantly accelerated HER kinetics. The introduced Mo sites not only effectively facilitate water dissociation process and desorption of the OHads intermediates, but also simultaneously optimize the hydrogen adsorption free energy. Therefore, the in situ-generated Mo-doped amorphous cobalt hydroxide exhibited a remarkable HER performance in alkaline media with an overpotential of only -80 mV at a current density of 10 mA/cm2. This thesis innovatively explores strategies to improve the catalytic activity towards HER of metal (hydro)oxide in alkaline media. The surface foreign atom doping was demonstrated to manipulate the surface structure of catalysts, thus not only improving the water dissociation processes, but also facilitating the hydrogen adsorption/desorption on the catalysts. The demonstrated facile and effective strategies could be adopted for the fabrication of cost-effective and highly active catalysts for other important chemical reactions for energy conversion applications.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy (PhD)<br>School of Environment and Sc<br>Science, Environment, Engineering and Technology<br>Full Text
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Books on the topic "Alkaline water electrolysis"

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Stemp, Michael Colin. Homogeneous catalysis in alkaline water electrolysis. National Library of Canada, 1997.

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Lumanauw, Daniel. Hydrogen bubble characterization in alkaline water electrolysis. National Library of Canada, 2000.

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Law, Joseph. The role of vanadium as a homogeneous catalyst in alkaline water electrolysis. National Library of Canada, 1998.

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Suzuki, Hiroyuki. Production and electrochemical behaviour of Ni-Co-Mo-B amorphous alloys for alkaline water electrolysis. National Library of Canada = Bibliothèque nationale du Canada, 1995.

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H, Wendt, and Commission of the European Communities. Directorate-General for Science, Research and Development., eds. Nickel-net supported cermet diaphragms and distance-free electrode-diaphragm sandwiches for advanced alkaline water electrolysis. Commission of the European Communities, 1985.

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Book chapters on the topic "Alkaline water electrolysis"

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Guillet, Nicolas, and Pierre Millet. "Alkaline Water Electrolysis." In Hydrogen Production. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527676507.ch4.

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Ito, Kohei, Hua Li, and Yan Ming Hao. "Alkaline Water Electrolysis." In Green Energy and Technology. Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56042-5_9.

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Vermeiren, Ph, W. Adriansens, J. P. Moreels, and R. Leysen. "The Composite Zirfon® Separator for Alkaline Water Electrolysis." In Hydrogen Power: Theoretical and Engineering Solutions. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9054-9_21.

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Leysen, R., W. Doyen, R. Proost, and H. Vandenborre. "A Thin Porous Polyantimonic Acid Based Membrane as a Separator in Alkaline Water Electrolysis." In Membranes and Membrane Processes. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-2019-5_32.

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Mamlouk, M., and M. Manolova. "Chapter 6. Alkaline Anionic Exchange Membrane Water Electrolysers." In Electrochemical Methods for Hydrogen Production. Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781788016049-00180.

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Guo, Xuefeng, Shanyong Chen, Yu Zhang, Mingjiang Xie, and Jian Chen. "Alkaline Liquid Electrolyte for Water Electrolysis." In Electrochemical Water Electrolysis. CRC Press, 2020. http://dx.doi.org/10.1201/9780429447884-2.

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Shin, Yongbeom, Jongyeon Oh, Dongkuk Jang, and Dongil Shin. "Digital Twin of Alkaline Water Electrolysis Systems for Green Hydrogen Production." In Computer Aided Chemical Engineering. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-323-85159-6.50247-5.

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Hourng, Lih-Wu, Wei-Hua Wu, and Ming-Yuan Lin. "The improvement of water electrolysis efficiency by using acid-alkaline electrolysis with multi-electrode and pulsed current." In Engineering Innovation and Design. CRC Press, 2019. http://dx.doi.org/10.1201/9780429019777-29.

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Kim, Yeonghyun, Youngjin Kim, Jae Hyun Cho, and Il Moon. "Alkaline Water Electrolysis Model to Purify GMP grade NaOH Solutions for Biopharmaceutical Manufacturing Processes." In Computer Aided Chemical Engineering. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-323-95879-0.50048-5.

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Gomes, João, Jaime Puna, António Marques, et al. "Clean Forest – Project concept and preliminary results." In Advances in Forest Fire Research 2022. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_243.

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The aim of this project is to valorize forest biomass wastes into bioenergy, more precisely, production of 2nd generation synthetic biofuels, such as, biogas, biomethanol, bio-DME, etc., depending on process operating conditions, such as, pressure, temperature and type of solid catalyst used. The valorization of potential forest wastes biomass enhances the reduction of probability of occurrence of forest fires and, presents a major value for local communities, especially, in rural populations. Biogas produced can be burned as biofuel to produce heat and/or electricity, for instance, in cogeneration engines applied for domestic/industrial purposes. After the removal of forest wastes from the forest territory, this biomass is dried, grounded to reduce its granulometry and liquified at temperatures between 100-200 ºC. Then, using the electrocracking technology, this liquified biomass is mixed with an alkaline aqueous electrolyte located in an electrolyser (electrochemical reactor which performs an electrolysis process), using a potential catalyst, in order to produce syngas (fuel gas, mainly composed by CO, H2 and CO2). In a second reaction step, this syngas produced can be valorized in the production of synthetic biofuels, in a tubular catalytic reactor. The whole process is easy to implement and energetically, shows significative less costs than the conventional process of syngas gasification, as the energy input in conventional pyrolysis/gasification process is higher than 500 ºC, with higher pressures, while, in the electrochemical process, applied in this project, the temperatures are not higher than 70 ºC, with 4 bars of pressure, at maximum. Besides that, the input of energy necessary to promote the electrolysis process can be achieved with solar energy, using a photovoltaic panel. In the production of biogas in the catalytic reactor, there is another major value from this process, which is the co-production of water, as Sabatier reaction converts CO2 and H2 into biomethane (CH4) and steam water, at atmospheric pressure, with 300 ºC of temperature, maximum, with a high selective solid catalyst. Finally, it is expected to produce a new bio-oil from this kind of biomass, with properties more closer to a fossil fuel than wood bio-oils, which can be used as a fuel or as a diolefins/olefins source and, also, to produce, from forest biomass wastes, pyrolytic bio-oils with complementary properties and valorised characteristics. This can be used in wood treatment or as a phenol source, for several industrial applications. A new and valorised application can be found for forest biomass wastes, which can be incorporated in the biorefinery concept.
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Conference papers on the topic "Alkaline water electrolysis"

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d’Amore-Domenech, Rafael, Emilio Navarro, Eleuterio Mora, and Teresa J. Leo. "Alkaline Electrolysis at Sea for Green Hydrogen Production: A Solution to Electrolyte Deterioration." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77209.

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This article illustrates a novel method to produce hydrogen at sea with no carbon footprint, based on alkaline electrolysis, which is the cheapest electrolysis method for in-land hydrogen production, coupled to offshore renewable farms. The novelty of the method presented in this work is the solution to cope with the logistic problem of periodical renewal of the alkaline electrolyte, considered problematic in an offshore context. Such solution consists in the integration of a small chlor-alkali plant to produce new electrolyte in situ. This article describes a proposal to combine alkaline water electrolysis and chlor-alkali processes, first considering both in a separate manner, and then describing and discussing the combined solution, which seeks high efficiency and sustainability.
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Reddy, G. N., Sadish Shrestha, Bishesh Acharya, Vijaya Krishna Teja Bangi, and Ramesh Guduru. "Analysis of Hydrogen Dry Cell for Alkaline Water Electrolysis." In 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2018. http://dx.doi.org/10.1109/icrera.2018.8566705.

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Reddy, G. N., Vijaya Krishna Teja Bangi, and Ramesh Guduru. "Low-maintenance Solar-hydrogen Generator Using Alkaline Water Electrolysis." In 2019 8th International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2019. http://dx.doi.org/10.1109/icrera47325.2019.8997069.

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Albornoz, Matias, Marco Rivera, Roberto Ramirez, Felipe Varas-Concha, and Patrick Wheeler. "Water Splitting Dynamics of High Voltage Pulsed Alkaline Electrolysis." In 2022 IEEE International Conference on Automation/XXV Congress of the Chilean Association of Automatic Control (ICA-ACCA). IEEE, 2022. http://dx.doi.org/10.1109/ica-acca56767.2022.10006326.

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Cheng, Haoran, Yetian Wu, Yanghong Xia, and Wei Wei. "An Improved Model for Hydrogen Production by Alkaline Water Electrolysis." In 2021 IEEE 5th Conference on Energy Internet and Energy System Integration (EI2). IEEE, 2021. http://dx.doi.org/10.1109/ei252483.2021.9713536.

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Lee, Sang-Jun, and Youn-Jea Kim. "Dependence of Ice Thickness on the Performance of Medicated Water Electrolysis Apparatus." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-14013.

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Medicated water electrolysis apparatus, which electrolyzes water into acidic water and alkaline water, was in the spotlight as the effect of alkaline water was became known. It is known to have a positive effect for health as removing active oxygen in the human’s body and promoting digestion. But, the customers could not get their desired water temperature due to the fact that these apparatuses are directly connected with water pipe. So, the cooling system to control the temperature of the alkaline water was developed. One of the typical way is to store water in water tank and control its temperature. But, in this way, stored water can be polluted by impurities entering from outside. As the protection for this pollution, the cooling system based on indirect heat exchange method through phase change between water and ice was developed. In this study, we have calculated the efficiency of the cooling system with phase change by experiment and commercial CFD (Computational Fluid Dynamics) code, ANSYS CFX. To consider the effect of latent heat generated by the melting ice, we have simulated two phase numerical analyses by using enthalpy method and found the temperature, velocity, and ice mass distribution, which are required to calculate the efficiency of cooling system. From the results, we obtained the relationship between the cooling efficiency and the thickness of ice, which is created by evaporator located in the cooling system.
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Stewart, Katherine, Laurianne Lair, Brenda De La Torre, et al. "Modeling and Optimization of an Alkaline Water Electrolysis for Hydrogen Production." In 2021 IEEE Green Energy and Smart Systems Conference (IGESSC). IEEE, 2021. http://dx.doi.org/10.1109/igessc53124.2021.9618679.

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Dominguez, Rodrigo, Enrique Calderón, and Jorge Bustos. "Safety Process in electrolytic green hydrogen production." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001634.

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The article objective is to analyze the electrolytic process of green hydrogen production from process safety and process safety management (PSM) points of views. The green hydrogen through water electrolysis production of is emerging as one of the main and best alternatives to replace the use of fossil fuels and thus mitigate environmental pollution and its consequences to the planet. For this purpose, the principles of the electrolysis process were established, as well as the different ways to carry it out, among which are: Alkaline electrolysis (AE); Proton exchange membrane (PEM) electrolysis and High-Temperature electrolysis (HTE). Its associated hazards and risks were mentioned, and the Dow Fire and Explosion Index (F&amp;EI) was calculated for the three electrolysis methods, obtaining similar results with each other. In addition, the Canadian Society for Chemical Engineering (CSChE) PSM standard and the main international standards must be applied to electrolytic hydrogen production systems, such as: ISO 31000:2018 ; ISO 15916:2015 and ISO 22734:2019, was observed. Like other fuels, hydrogen processes production must be managed with preventive measures avoid events may have negative consequences to people, structures, and surrounding environment.
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Mu’minah, Qonita, and Aep Patah. "Effectiveness of Ni-Fe alloy as cathode in alkaline water electrolysis process." In THE 2ND INTERNATIONAL CONFERENCE ON SCIENCE, MATHEMATICS, ENVIRONMENT, AND EDUCATION. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5139799.

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Liu, T., R. Reißner, G. Schiller, and A. Ansar. "Plasma Sprayed Raney Nickel Coatings for Hydrogen Production by Alkaline Water Electrolysis." In ITSC2018, edited by F. Azarmi, K. Balani, H. Li, et al. ASM International, 2018. http://dx.doi.org/10.31399/asm.cp.itsc2018p0660.

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Abstract Plasma sprayed coatings of Raney nickel alloys developed as electrodes for hydrogen evolution electrodes in alkaline media, exhibit poor resistance to electrochemical erosion. The aim of this work is to develop an understanding of the correlation between plasma spray process parameters and coating quality and with that improve the electrochemical performance of the coatings. Air plasma spraying with TriplexPro gun was performed using NiAlMo powders. Plasma parameters were varied and particle inflight velocity and temperature was measured by Accuraspray. Coatings were developed for conditions in which particles in-flight temperatures were comparable but in-flight velocities differed. Electrochemical tests were performed for evaluating the effect of different velocities on electrode performance. Coating attained with particles having higher velocity exhibited better electrochemical performance and durability. The microstructure and elements map before and after the electrochemical test performed by SEM and EDX show that the coatings with higher velocity particles led to microstructure that enabled better activation of the electrodes and higher surface area for reactions.
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Reports on the topic "Alkaline water electrolysis"

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Xu, Hui, Judith Lattimer, Yamini Mohan, and Steve McCatty. High-Temperature Alkaline Water Electrolysis. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1826376.

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Kim, Yu Seung. Scalable Elastomeric Membranes for Alkaline Water Electrolysis. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1423967.

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Mukundan, Rangachary. Accelerated Stress Test (AST) Development for Advanced Liquid Alkaline Water Electrolysis. Office of Scientific and Technical Information (OSTI), 2022. http://dx.doi.org/10.2172/1844102.

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Pengliang, Sun. Carbon Emission Calculation and Benefit Analysis of Hydrogen Production Project by Electrolysis of Alkaline Water. Envirarxiv, 2021. http://dx.doi.org/10.55800/envirarxiv108.

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