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Dissertations / Theses on the topic 'Hydrogen Evolution Reaction (HER)'

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Published: 4 June 2021
Last updated: 6 September 2023

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1

Wang, Haozhu. "Cobalt Phosphide Single Site Electrocatalysts derived from 2D ZIF-8 for Hydrogen Evolution Reaction." Thesis, University of Sydney, 2021. https://hdl.handle.net/2123/26246.

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Hydrogen (H2) is a promising energy carrier due to its high gravimetric energy density and environmental friendliness. Among different approaches of H2 production, hydrogen evolution reaction (HER) via electrochemical water splitting has attracted significant research interests when electricity can be supplied by sustainable energy sources, such as solar, wind, and tidal energy. Electrocatalysts play a crucial role in accelerating HER's kinetics. Platinum (Pt)-based electrocatalysts have excellent catalytic activities for HER due to their optimal adsorption/desorption energy for hydrogen and h
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2

Zou, Yu. "Supported Composite Electrocatalysts for Energy Conversion Applications." Thesis, Griffith University, 2022. http://hdl.handle.net/10072/417198.

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Increasing energy demand and environmental awareness have promoted the development of efficient and environment-friendly hydrogen technologies. Water electrolysis (2𝐻2𝑂→2𝐻2+𝑂2) is a promising way to store renewable electricity generated by solar or wind energy into chemical fuel in the form of H2. Water electrolysis is comprised of a hydrogen evolution reaction (HER) on the cathode and an oxygen evolution reaction (OER) on the anode. For both HER and OER, highly catalytic active electrocatalysts are required to lower the overpotentials and to speed up the sluggish kinetics. To date, noble meta
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3

Shi, Zhangsheng. "Strain engineering of Co-N-C catalyst toward enhancing the HER and ORR electrocatalytic activities." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/207078/8/Zhangsheng_Shi_Thesis.pdf.

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This thesis presents a comprehensive review of practical strategies to enhance the catalytic activity of M-N-C materials. The practical strategies can be extended to engineer external factors to break the linear scaling relationships and to further enhance the catalytic performances. In order to design the next-generation higher-performance catalysts, this project was a step forward in developing strain and heterostructure method to achieve a superior HER performance and a ORR performance beyond the limit.
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4

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. Alkal
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5

Dessources, Samuel. "Conception de matériaux de type PtxM1-x/C (M=Ni, Nb) et PtxNi1-x/CeO2/C pour l'électroréduction de l'eau (HER) et l'électrooxydation du dihydrogène (HOR)." Thesis, Poitiers, 2015. http://www.theses.fr/2015POIT2317/document.

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Le platine constitue le matériau de référence pour l’électroréduction de l’eau (HER) et l’électrooxydation du dihydrogène (HOR). Les propriétés physicochimiques de ce matériau d’électrode synthétisé sous forme Pt/C par la méthode BAE et les paramètres cinétiques des réactions électrochimiques HOR et HER à sa surface en milieu alcalin ont été déterminés. Le palladium et l’or ont aussi des activités intéressantes vis-à-vis de ces réactions. L’activité de ces métaux nobles supportés sur carbone et obtenus par la même méthode de synthèse a été étudiée dans les mêmes conditions pour établir une étu
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6

Karimi, Shervedani Reza. "Kinetics of hydrogen evolution reaction on Ni-Me-P electrodes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq26382.pdf.

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7

Shervedani, Reza Karimi. "Kinetics of hydrogen evolution reaction on Ni-Me-P electrodes." Thèse, Sherbrooke : Université de Sherbrooke, 1997. http://savoirs.usherbrooke.ca/handle/11143/4954.

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8

Zhou, Leyao. "Electroless Deposited Transitional Metal Phosphide for Oxygen/Hydrogen Evolution Reactions." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1522333083629295.

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9

Wright, Edward Anthony. "A study of the hydrogen evolution reaction on platinum group metals." Thesis, University of Exeter, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414258.

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10

Luo, Lin. "Novel Nanostructure Electrocatalysts for Oxygen Reduction and Hydrogen Evolution Reactions." University of the Western Cape, 2019. http://hdl.handle.net/11394/7315.

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Philosophiae Doctor - PhD<br>The widespread use of fossil energy has been most convenient to the world, while they also cause environmental pollution and global warming. Therefore, it is necessary to develop clean and renewable energy sources, among which, hydrogen is considered to be the most ideal choice, which forms the foundation of the hydrogen energy economy, and the research on hydrogen production and fuel cells involved in its production and utilization are naturally a vital research endeavor in the world. Electrocatalysts are one of the key materials for proton exchange member
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11

Anthony, David M. "Effects of cyclic current modulation on cathode materials for the hydrogen evolution reaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/MQ40982.pdf.

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12

Smale, Simon. "Study of the hydrogen evolution reaction on platinum and platinum group metal surfaces." Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54760/.

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The hydrogen evolution reaction (HER) has been examined on a variety of Pt and Pt-group metal surfaces to investigate the rate of the reaction. Pt stepped single crystal surfaces were investigated in relation to the HER using cyclic voltammetry, linear sweep voltammetry and multi-frequency AC voltammetry. It was found that the hydrogen evolution reaction activity did not show a dependence on the structure of single crystal platinum electrode surfaces. Thick films of Au, Rh and Pd were deposited onto Pt {111} and successfully annealed to give pseudomorphic surfaces of the bulk metal. The aim of
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13

Xing, Shihui. "Rational design of bi-transition metal oxide electrocatalysts for hydrogen and oxygen evolutions." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/209307/1/Shihui_Xing_Thesis.pdf.

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This thesis mainly focuses on the rational design and preparation of bi-transition metal oxide materials for high-performance electrochemical catalysis, such as hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). To address the challenges of sluggish kinetics and large overpotentials in HER and OER, the effective strategy of morphology engineering, introducing a secondary metal element and supporting on carbon-based materials were carried out and discussed.
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14

Jiang, Bing. "Nickel and cobalt bis (imino)pyridine complexes as catalysts for the hydrogen evolution reaction." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667777.

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El subministrament d'energia sostenible és un desafiament crític que enfronta la humanitat. La dependència dels combustibles fòssils ha despertat l'interès en el desenvolupament de fonts d'energia lliures de carboni, entre les quals el dihidrogen que té una alta densitat d'energia seria un dels més prometedors sempre que es generi a partir d'alternatives renovables. En aquest context, dissociar l'aigua per produir hidrogen com a combustible és de gran interès i, per tant, s'estan desenvolupant una gran quantitat de catalitzadors per accelerar la velocitat d'aquesta reacció, preferiblement obti
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15

Brousseau, Rejean. "Evaluation of the coverage by kinetically involved H intermediates during the hydrogen evolution reaction." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/21143.

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16

Cochran, Colin John. "Electrochemical study of the hydrogen evolution reaction on nickel-palladium-phosphorous amorphous metal alloys for use in alkaline hydrogen systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ51556.pdf.

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17

Bai, Lijun. "Determination of the adsorption behaviour of O.P.D. H species in the cathodic hydrogen evolution reaction." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4626.

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18

Lee, Heung Chan. "Magnetic field effects on electron transfer reactions: heterogeneous photoelectrochemical hydrogen evolution and homogeneous self exchange reaction." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/2562.

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Magnetic field effects (MFE) on electrochemical systems have been of interest to researchers for the past 60 years. MFEs on mass transport, such as magnetohydrodynamics and magnetic field gradients effects are reported, but MFEs on electron transfer kinetics have been rarely investigated. Magnetic modification of electrodes enhances electron transfer kinetics under conditions of high concentrations and low physical diffusion conditions, as shown by Leddy and coworkers. Magnetic microparticles embedded in an ion exchange polymer (e.g., Nafion) applied to electrode surfaces. Rates of electron tr
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19

Sinanan, Anson R. "Nickel-based amorphous alloys with Cr/V additions for the hydrogen evolution reaction in alkaline solution." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63143.pdf.

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20

Ekspong, Joakim. "Hydrogen Fuel from Water - An Advanced Electrocatalyst based on Nitrogen doped Carbon Nanotubes." Thesis, Umeå universitet, Institutionen för fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105553.

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The production of cost-effective catalysts for the production of hydrogen by electrolysis of water is important for clean energy production. In this work we report on a study of molybdenum disulfide (MoS2) as catalyst for the hydrogen evolution reaction (HER). Nitrogen doped carbon nanotubes (NCNTs) directly synthesized onto carbon paper have been decorated with MoS2. The electrodes utilize the improved conductivity of the NCNTs and the carbon paper for electron transport, combined with the high catalytic activity of MoS2. The NCNTs were successfully decorated with co-axial nano-flakes of MoS2
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21

Zhang, Tianhou. "Theoretical Studies of Fuel Cell Reaction Mechanisms: Water and Oxygen on Platinum Electrodes." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1215456813.

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22

Sultana, Ummul Khair. "Electrochemical synthesis of water splitting nanomaterials." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/126972/1/Ummul%20Khair_Sultana_Thesis.pdf.

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This project was a step forward in electrochemically synthesizing nanomaterials for the water splitting reaction which directly produces hydrogen and oxygen. The thesis investigated the performances of newly developed nanomaterials for the energetically demanding water splitting reaction. In order to understand the reaction mechanism, thorough materials characterization was carried out to identify structure-activity relationships. This study also answers some fundamental questions such as "bifunctionality" in the field of water electrolysis. It also presents the modification of a readily avail
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23

Wakisaka, Takuo. "Rational Syntheses of New Metal Nanoparticles and Investigation of Catalytic Activity." Kyoto University, 2020. http://hdl.handle.net/2433/253114.

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24

Li, Junwei. "Investigation of Structural-Catalytic Relationship of Mixed-Metal Layered Oxide Materials for Photocatalytic Overall Water Splitting." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29385.

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Hydrogen can be generated renewably by sunlight driven, photocatalytic water splitting. Metal oxides, including those with a Ruddlesden-Popper type structures are being studied as potential photocatalysts. From the initial testing of multiple metal oxides, KLaTiO4 and Na3Co2SbO6 was found to be particularly effective as catalyst for hydrogen evolution. During testing, the solid-state synthesis of KLaTiO4 was found to be unreliable, with most samples found with K2La2Ti3O10 impurities. Two main factors were found to have significantly impacted the yield of KLaTiO4. The first factor to consider
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25

Gottschling, Kerstin [Verfasser], and Bettina [Akademischer Betreuer] Lotsch. "Towards single-site heterogeneous catalysts for the hydrogen evolution reaction based on covalent organic frameworks / Kerstin Gottschling ; Betreuer: Bettina Lotsch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1218466081/34.

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26

Gao, Guoping. "Computational design of catalysts for clean energy conversion and storage." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/109443/1/Guoping_Gao_Thesis.pdf.

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This project focuses on the computational design of novel catalyst for artificial synthesis: converting sunlight into fuels. With the atomic-scale insight of catalysts obtained by theoretical calculations, many efficient and optimum catalysts for these processes have been designed and engineered. The outcomes of this thesis are expected to provide theoretical solutions for current global energy and environmental challenges.
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27

He, Tianwei. "Computational discovery and design of nanocatalysts for high efficiency electrochemical reactions." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/203969/1/Tianwei_He_Thesis.pdf.

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This thesis reports a computational discovery and design of highly efficient electrocatalysts for various of electrochemical reactions. The method is based on the Density Functional Theory (DFT) by using Vienna ab initio simulation package (VASP). This project is a step forward in developing the low-cost, high activity, selectivity, stability and scalability for the electrochemical reactions, which could make a contribution to the global-scale green energy system for a clean and sustainable energy future.
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28

Dolgikh, O. V., N. V. Sotskaya, and L. V. Sapronova. "Electrochemical Behavior of Electrodeposited Ni-P Coatings in Acidic Solutions." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35466.

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The paper is devoted to the investigation of cathodic and anodic behavior of electrodeposited Ni-P alloys of different composition in H2SO4 solutions. It was established that increase of phosphorous content enhances anticorrosion ability of Ni-P coatings and decreases their catalytic activity toward to hydrogen evolution reaction. The most probable mechanism of this reaction was suggested on the basis of analysis of experimental data. It assumes that at low overpotentials hydrogen evolution proceeds by Volmer- Heyrovsky route with limiting step of charge transfer. At higher potentials Vol
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29

Jiang, Nan. "Inorganic Electrocatalysts for Innovative Water Splitting and Organic Upgrading." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7386.

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The booming worldwide demand for energy and the increasing concerns about global warming due to fossil fuel consumption have urged the development of techniques for storing and converting renewable and clean energy resources. Electrocatlytic or photoelectrocatalytic water splitting to generate green energy carrier H2 with sustainable energy input, like solar, has been regarded as an attractive strategy for carbon-neutral energy needs. However, the sluggish kinetics for both half reactions (HER and OER), high overpotentials and thermodynamic requirements, and H2 and O2 gas crossover have been r
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30

Beauchamp, Damian Richard. "Molecular Engineering of Organic Photosensitizes for P-type Dye-Sensitized Solar Cells and the Immobilization of Molecular Catalyst for the Hydrogen Evolution Reaction." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1456917343.

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31

Jiang, Nan. "First-Row Transition Metal Sulfides and Phosphides as Competent Electrocatalysts for Water Splitting." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6480.

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Conversion of renewable energy resources (such as solar and wind) through water splitting to hydrogen and oxygen has attracted increasing attention. The sole product of hydrogen combustion is water, rendering a carbon-neutral energy cycle. Water splitting consists of two redox half reactions: hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Both of these two transformations involve multi- electron/proton movement and thus are kinetically sluggish. In order to accelerate the reaction rates for practical application, efficient catalysts are needed. State-of-the-art catalyst
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32

Rodríguez, Hernández Fermín. "Theoretical description of water splitting on TiO2 and combined Mo2C-graphene based materials." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-227530.

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The electrocatalytic water decomposition has been investigated in this thesis by means of its two half standard reactions: the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). These reactions occur in different locations in a typical electrochemical cell: the anode and the cathode, respectively. Motivated by the lack of understanding about the reaction mechanisms occurring at the anodes and cathodes, we have proposed first: novel representations of typical TiO2 surfaces, based on small cluster systems, which can be used for a quick and more detailed assessment of the
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33

Oshchepkov, Alexandr. "Investigation of the hydrogen electrode reactions on Ni electrocatalysts in alkaline medium." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF071/document.

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La thèse présentée traite principalement de l'influence de la composition et de l’état de surface d’électrodes à base de Ni sur la cinétique et le mécanisme des réactions d'oxydation/dégagement de l'hydrogène (HOR/HER) en milieu alcalin. En combinant les résultats de mesures électrochimiques avec une modélisation microcinétique, il a pu être montré que l'activité spécifique du Ni pour l’HOR/HER augmente jusqu'à 10 fois en présence à la fois d’oxydes de Ni et de Ni métallique à la surface de l'électrode. En outre, l'influence de l'addition d’un second métal aux électrocatalyseurs à base Ni sur
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34

Ma, Lu. "Mo-S Chemistry: From 2D Material to Molecular Clusters." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480268313180315.

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35

Eguchi, Daichi. "High Functionalization of Nanomaterials by Controlling Organic-Inorganic Interface." Kyoto University, 2017. http://hdl.handle.net/2433/227580.

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36

Naderinasrabadi, Mahtab. "A Continuous Electrochemical Process to Convert Lignin to Low Molecular Weight Aromatic Compounds and Cogeneration of Hydrogen." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1584622583669502.

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37

Meng, Yao. "Hydrogen electrochemistry in room temperature ionic liquids." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:be24c6ea-c351-4855-ad9c-98e747ac87e4.

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This thesis primarily focuses on the electrochemical properties of the H<sub>2</sub>/H<sup>+</sup> redox couple, at various metallic electrodes in room temperature ionic liquids. Initially, a comprehensive overview of room temperature ionic liquids, RTILs, compared to conventional organic solvents is presented which identifies their favourable properties and applications, followed by a second chapter describing the basic theory of electrochemistry. A third chapter presents the general experimental reagents, instruments and measurements used in this thesis. The results presented in this thesis
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38

Bernsmeier, Denis Robert [Verfasser], Ralph [Akademischer Betreuer] Krähnert, Ralph [Gutachter] Krähnert, Peter [Gutachter] Strasser, and Christina [Gutachter] Roth. "Noble metal nanoparticles supported in ordered mesoporous carbon coatings as efficient electrocatalysts for the hydrogen evolution reaction / Denis Robert Bernsmeier ; Gutachter: Ralph Krähnert, Peter Strasser, Christina Roth ; Betreuer: Ralph Krähnert." Berlin : Technische Universität Berlin, 2017. http://d-nb.info/1156014301/34.

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39

Oloye, Olawale. "Design and engineering of nanostructured liquid metal composites for catalytic applications." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/227405/1/Olawale_Oloye_Thesis.pdf.

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This thesis concentrated on the study of the room temperature liquid metal, gallium and its eutectics. The application of liquid metal-based alloys to new areas of catalysis was extended by encompassing energy and environmental applications. A significant advancement in the potential application of liquid metal-based alloys in electrocatalysis, photocatalysis and sonocatalysis has resulted from this research. Significantly, research conducted on carbon dioxide capture/conversion to metal carbonates during this graduate study is currently being explored for industrial waste management.
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40

Ying, Qiling. "Preparation and characterization of highly active nano pt/c electrocatalyst for proton exchange membrane fuel cell." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3791_1188474883.

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<p>Catalysts play an essential role in nearly every chemical production process. Platinum supported on high surface area carbon substrates (Pt/C) is one of the promising candidates as an electrocatalyst in low temperature polymer electrolyte fuel cells. Developing the activity of the Pt/C catalyst with narrow Pt particle size distribution and good dispersion has been a main concern in current research.</p> <p><br /> In this study, the main objective was the development and characterization of inexpensive and effective nanophase Pt/C electrocatalysts. A set of modified Pt/C electrocatalysts wit
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41

Benchakar, Mohamed. "Synthèse et caractérisation de nouveaux composés bidimensionnels, les MXènes, pour le stockage et la conversion de l'énergie." Thesis, Poitiers, 2020. http://www.theses.fr/2020POIT2271.

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L'hydrogène est le vecteur énergétique le plus prometteur pour l’implémentation de la grille énergétique du futur. Il peut être obtenu en employant diverses méthodes de production. Parmi tous ces procédés, l’électrolyse de l’eau est d’intérêt car elle permet d’obtenir directement du dihydrogène de grande pureté qui peut donc être utilisé au sein d’une pile à combustible H2/O2. Toutefois, l’élaboration d’électrodes peu coûteuses, actives et stables est nécessaire pour entreprendre le développement des électrolyseurs à grande échelle. Dans ce contexte, les matériaux 2D suscitent un engouement im
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Zang, Dejin. "Hybrid polyoxometalate@M NP photosensitized systems for the generation of photocurrent or for the generation of dihydrogen." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAF032.

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Différents systèmes polyoxométallates@M-colorants ont été réalisés dans cette thèse pour électrochimique dégagement d'hydrogène catalytique et génération photocourant.• Des films hybrides, basés sur des interactions électrostatiques entre une porphyrine tetracationique et des nanoparticules stabilisées par des POMs du type POM@Pt sur ITO, ont été formés par la méthode dite couche par couche et ont été utilisés pour la génération de H2 ou de photocourant. • Pour améliorer le transfert de charge entre les nanoparticules POM@M et le substrat, la réduction de l'oxyde de graphène a été réalisée pou
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43

Lekbir, Choukri. "Effet de la déformation plastique du nickel monocristallin sur l'état d'équilibre de l'hydrogène en surface et subsurface." Thesis, La Rochelle, 2012. http://www.theses.fr/2012LAROS368.

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Le présent travail a pour objectif d’étudier la synergie entre la déformation plastique et les processus d’adsorption et d’absorption de l’hydrogène en surface et en subsurface du nickel monocristallin. La Réaction d’Evolution de l’Hydrogène (REH) et l’absorption de l’hydrogène en subsurface (RAH)partagent le plus souvent l’intermédiaire commun : l’hydrogène adsorbé (Hads). Le chemin réactionnel de la REH sur des surfaces de nickel (100) en milieu acide sulfurique peut être présenté par un mécanisme de Volmer-Heyrovsky. Les paramètres cinétiques élémentaires correspondants comme les coefficien
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44

Sarabia, Francisco J. "Interfacial studies of Pt and Cu single-crystal electrodes modified by transition metal deposition." Doctoral thesis, Universidad de Alicante, 2021. http://hdl.handle.net/10045/118535.

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El conocimiento de las características interfaciales es de suma importancia para poder desarrollar materiales que sean capaces de dar lugar a reacciones electrocatalíticas eficientes. Por esta razón, en esta tesis se muestran diferentes estudios interfaciales sobre superficies monocristalinas de platino y cobre en diferentes electrolitos. Además se estudian las características de la interfase electrodoldisolución con superficies de platino modificadas con adátomos de hierro, cobalto y níquel. Para ello, se han empleado las técnicas de voltametría cíclica, espectroscopía infrarroja con transfor
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Li, Zhengxing. "The Synthesis and Electrocatalytic Activities of Molybdenum Sulfide for Hydrogen Evolution Reaction." Thesis, 2014. http://hdl.handle.net/10754/324122.

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In the context of the future hydrogen economy, effective production of hydrogen (H2) from readily available and sustainable resources is of crucial importance. Hydrogen generation via water splitting by solar energy or electricity has attracted great attention in recent years. In comparison with photocatalytic water-splitting directly using solar light, which is ideal but the relevant technologies are not yet mature, electrolysis of water with catalyst is more practical at the current stage. The Pt-group noble metals are the most effective electrocatalysts for hydrogen evolution reaction (HER)
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46

Brischetto, Martin. "Slim Moly S makes hydrogen : Layer dependent electrocatalysis in hydrogen evolution reaction with individual MoS2 nanodevices." Thesis, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355025.

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Molybdenum disulfide (MoS2) has been demonstrated to be a potential catalyst in the hydrogen evolution reaction (HER). Due to its highly active edge site, abundance, and low cost, it rivals Pt. However, the potential activity of the MoS2 basal plane has largely been ignored. The physical characteristics of MoS2 and its corresponding band structure change significantly with decreasing thickness, especially at the monolayer limit. Thus, an investigation on the thickness dependence may provide important insights into the MoS2 basal plane activity. In this thesis, the layer dependent electrocataly
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47

Sarkar, Sujoy. "Electrocatalytic Studies on Layer-type Ternary Phosphochalcogenides and on the Formation of Nitride Phases." Thesis, 2014. http://hdl.handle.net/2005/3027.

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Research on new, environment-friendly, clean and efficient energy sources have contributed immensely to the development of new technologies for the generation and storage of electrical energy. Heterogeneous ‘electrocatalysis’ involves catalysis of redox reactions where the electrode material, termed as ‘electrocatalyst’ reduces the overpotential and maximizes the current for the processes occurring at the electrode/electrolyte interface. Efficient catalysts for hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) are of paramount importance fo
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48

Kukunuri, Suresh. "Palladium and Nickel Chalcogenides as Electrocatalysts." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2851.

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In recent years, there has been an increasing interest on renewable energy sources as substitute to fossil fuels. Among various processes of energy generation, electrochemical methods such as storage and conversion systems, electrolysis of water (production of H2 and O2), fuel cells, batteries, supercapacitors and solar cells have received great attention. The core of these energy technologies is a series of electrochemical processes, which directly depend on the nature of ‘electro catalyst’. The design and preparation of an electro catalyst is based on new concepts such as controlled surface
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49

Irshad, Ahamed M. "Electrochemical and Photoelectrochemical Investigations of Co, Mn and Ir-Based Catalysts for Water Splitting." Thesis, 2016. http://hdl.handle.net/2005/3099.

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Synopsis of thesis entitled “Electrochemical and Photoelectrochemical Investigations of Co, Mn and Ir-based Catalysts for Water Splitting” by Ahamed Irshad M (SR No: 02-01-02-10-11-11-1-08823) under the supervision of Prof. N. Munichandraiah, Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore (India), for the Ph.D. degree of the Institute under the Faculty of Science. Hydrogen is considered as the fuel for future owing to its high gravimetric energy density and eco-friendly use. In addition, H2 is an important feedstock in Haber process for ammonia synthesi
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50

Mukherjee, Debdyuti. "Electrocatalytic Studies Using Layered Transition Metal Thiphosphates, Metal Chalcogenides and Polymers." Thesis, 2017. http://etd.iisc.ernet.in/2005/3569.

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The ever increasing demand for energy due to over consumption of non-renewable fossil fuels has emphasized the need for alternate, sustainable and efficient energy conversion and storage systems. In this direction, electrochemical energy conversion and storage systems involving various fundamental electrochemical redox processes such as hydrogen evolution (HER), oxygen reduction (ORR), oxygen evolution (OER), hydrogen oxidation (HOR) reactions and others become highly important. Electrocatalysts are often used to accelerate the kinetics of these reactions. Platinum (Pt), ruthenium oxide and ir
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