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Dissertations / Theses on the topic 'Electro-reduction'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Bechtold, Tamara. "Model order reduction of electro-thermal MEMS." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975996134.

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2

Le, Bras Nathalie. "Nouveaux cyclophanes et cryptands : synthese, etude des conformations, electro-reduction." Rennes 1, 1992. http://www.theses.fr/1992REN10137.

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L'addition de l'acrylate de methyle sur un dialdehyde, en presence de diazabicyclooctane, suivie d'une reaction d'acetylation est une voie d'acces simple a des precurseurs de cyclophanes et de cryptands. L'utilisation de divers dialdehydes comme l'isophtalaldehyde, des isophtalaldehydes substitues, le furanne 2,5-dicarboxaldehyde et un dialdehyde qui derive de la disubstitution d'un dihalogenure d'alkyle par un hydroxybenzaldehyde a permis de generaliser cette methode de synthese. Des cryptands symetriques, des orthocyclophanes et un metacyclophane sont ainsi obtenus par action de l'ammoniaque

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3

Neri, G. "The electro- and photochemical reduction of CO2 mediated by molecular catalysts." Thesis, University of Liverpool, 2016. http://livrepository.liverpool.ac.uk/3007220/.

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In this work, molecular complexes of transition metals have been synthesised and studied for their CO2 reduction ability, either in an electrochemical or photochemical system, with a focus on complexes of nickel with derivatives of the macrocycle cyclam (cyc, cyc = 1,4,8,11-tetraazacyclotetradecane) which are well-known for being extremely active CO2 reduction electrocatalysts in water. The cyc framework has been modified with functional groups suitable for binding to semiconductor oxides to obtain the new complexes Ni(cycC) and Ni(cycP) (cycC = 1,4,8,11-tetraazacyclotetradecane-6-carboxylic a

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4

Parker, Simon. "Anchored photo-electro-catalysts for CO2 reduction based on transition metal complexes." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/13396/.

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5

Zhai, Yuhu. "Model-order reduction for efficient simulation of nonlinear electro-magneto-thermal coupled problems." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001027.

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6

Pegis, Michael Lee. "Using Thermodynamics and Mechanism to Understand and Improve Dioxygen Reduction Electro- and Photoelectrocatalysts." Thesis, Yale University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10957334.

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<p> The dioxygen reduction reaction (ORR) is a key process for renewable energy technologies such as batteries and fuel cells. Reliance on dioxygen as the terminal oxidant in fuel cell technologies requires the development of electrocatalysts that proceed at low overpotentials with fast rates, while maintaining adequate selectivity for H<sub>2</sub>O production over thousands of hours of operation. While many advances have been made, the discovery of efficient and inexpensive ORR electrocatalytic materials remains a holy-grail of energy science. The study of soluble, molecular electrocatalysts

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7

Muhlenkamp, Katherine A. "Utilizing Surface Enhanced Raman Spectroscopy to Monitor the Carbon Dioxide Electro-Reduction Reaction on Copper at Low Overpotentials." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437744820.

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8

Lou, Yaoyin. "Electrochemical processes as a pre-treatment step before biological treatment : Application to the removal of organo-halogenated compounds." Thesis, Rennes, Ecole nationale supérieure de chimie, 2019. http://www.theses.fr/2019ENCR0057.

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Le couplage d’un traitement électrochimique avec un procédé biologique est une alternative prometteuse pour la dégradation de composés organo-halogénés biorécalcitrants dans l’environnement. Les procédés d’électroréduction, connus pour couper sélectivement la liaison carbone-halogène, ont été mis en oeuvre afin de réduire la toxicité des molécules cibles et augmenter leur biodégradabilité avant une minéralisation totale des polluants par un traitement biologique. Pour améliorer le rendement de déchloration, la cathode préalablement nickelée a été modifiée par des nanoparticules d’argent car l’

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9

Fang, Junchuan. "Electro-catalysis of Oxygen Reduction on Platinum-Bismuth Alloy Nanoparticles and a Study of Nafion Ionomer Impact." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1627663391900617.

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10

Rutherford, Scott Andrew. "Colour reconnection studies at LEP2 with the ALEPH detector and data reduction algorithms for the CMS electro-magnetic calorimeter." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408260.

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11

Garcia, Janaina de Souza. "Eletrorredução de nitrato em eletrodos de platina modificados por paládio." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-26082009-171914/.

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O estudo da eletrorredução de nitrato teve início na década de 70 e o catalisador mais estudado para esta reação é a platina, embora, para fins ambientais, o paládio seja mais indicado por apresentar maior seletividade para a formação de N2. Neste trabalho a eletrorredução de nitrato foi estudada em eletrodos de Pd, Pt e Pt com camadas de Pd. Primeiramente foi feito um estudo com nanopartículas de Pt, Pd e Pt com uma monocamada de Pd dispersas em carbono, mas a dificuldade em sugerir um mecanismo nesse tipo de eletrodo levou à utilização de eletrodos monocristalinos, que tem a superfície conhe

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12

Pfisterer, Jonas H. K. [Verfasser]. "Toward nanoscale reactivity mapping under electro-catalytic reaction conditions : Plasmon-enhanced vibrational spectroscopy of the electrochemical gold oxidation and gold oxide reduction / Jonas H. K. Pfisterer." Mainz : Universitätsbibliothek Mainz, 2019. http://d-nb.info/1199377449/34.

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13

Nandenha, Júlio. "Estudo da oxidação eletroquímica do ácido fórmico utilizando eletrocatalisadores Pd/C-Sb2O5.SnO2, PdAu/C-Sb2O5.SnO2, PdIr/C-Sb2O5.SnO2 e PdAulr/C-Sb2O5.SnO2 preparados via redução por borohidreto de sódio." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29072016-133123/.

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Os eletrocatalisadores Pd/C, Pd/C-15%ATO, PdAu/C-15%ATO (90:10, 70:30 e 50:50), PdIr/C-15%ATO (90:10, 70:30 e 50:50) e PdAuIr/C-15%ATO (90:5:5, 70:20:10 e 50:45:5) foram preparados pelo método de redução por borohidreto de sódio. Esses eletrocatalisadores foram caracterizados por espectroscopia de energia dispersiva de raios X (EDX), difração de raios X (DRX) e microscopia eletrônica de transmissão (MET), enquanto que as atividades eletrocatalíticas para a oxidação eletroquímica do ácido fórmico em meios ácido e alcalino foram investigadas por voltametria cíclica, cronoamperometria e experimen

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14

Vilekar, Saurabh A. "Catalytic and Electrocatalytic Pathways in Fuel Cells." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-dissertations/125.

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A fundamental understanding of the kinetics and mechanisms of the catalytic reaction steps involved in the process of converting a fuel into hydrogen rich stream suitable for a fuel cell, as well as the electro-catalytic reactions within a fuel cell, is not only conceptually appealing, but could provide a sound basis for the design and development of efficient fuel processor/fuel cell systems. With the quantum chemical calculations on kinetics of elementary catalytic reaction steps becoming rather commonplace, and with increasing information now available in terms of electronic structures, vib

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15

Briscoe, Mark William. "Electrochemical reduction of fluorinated systems and derived chemistry." Thesis, Durham University, 1989. http://etheses.dur.ac.uk/6549/.

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The work described in this thesis is divided into four sections: 1. The electrochemical reduction of fluorocarbon derivatives has been investigated. A number of systems have been studied analytically (using cyclic volt amine try) ; whilst preparatively a range of compounds have been synthesised, including semi-conducting polymers and four-membered perfluorocyclic products. 2. The use of sodium amalgam as an electromimetic medium to facilitate reduction of various fluorocarbon substrates has been studied. A series of volatile cyclic and acyclic F-dienes have been prepared from F-alkenes in good

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16

Ayoub, Jamil Mahmoud Said. "Preparação de eletrocatalisadores PtSb2O5.SnO2 suportados em carbono e ATO pelo método da redução por álcool para oxidação eletroquímica do etanol." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-15042013-092732/.

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Os eletrocatalisadores PtSn / C-ATO com Pt e Sn com diferentes relações atômicas (90:10, 70:30 e 50:50) foram preparados em uma única etapa pelo processo de redução por álcool usando H2PtCl6.6H2O e SnCl2.2H2O como fontes de metais e etileno glicol como solvente e agente redutor e de uma mistura física de carbono Vulcan XC72 (85% em peso) e ATO(Sb2O5.SnO2) (15% em peso) como o suporte (C-ATO). Os materiais obtidos foram caracterizados por difração de raios X (DRX) e microscopia eletrônica de transmissão (MET). A atividade catalítica para oxidação eletroquímica do etanol em meio ácido foi invest

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17

Castro, José Carlos de. "Desempenho de eletrocatalisadores PtSnRh suportados em carbono-Sb2O5.SnO2 para a oxidação eletroquímica do etanol, preparados pelo método de redução por álcool." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-28082013-090145/.

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Os eletrocatalisadores PtSnRh suportados em carbono-Sb2O5.SnO2, com 20% de massa de metal, foram preparados pelo método de redução por álcool, utilizando H2PtCl6.6H2O (Aldrich), RhCl3.xH2O (Aldrich) e SnCl2.2H2O (Aldrich), como fontes de metais; Sb2O5.SnO2 (ATO) e carbono Vulcan XC72, como suporte; e etileno glicol como agente redutor. Os eletrocatalisadores obtidos foram caracterizados fisicamente por difração de raios-X (DRX) e microscopia eletrônica de transmissão (MET). Por meio dos difratogramas observou-se que os eletrocatalisadores PtSnRh/C-ATO possuem estrutura CFC para a Pt e ligas de

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18

Janisch, Daniel. "Geo-inspired pathways towards ternary non-noble metal (pre-)catalysts for water splitting and CO2 reduction." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS387.pdf.

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Une transition des sources d'énergie fossiles vers la production d'énergie renouvelable nécessite des systèmes de stockage qui compensent l'intermittence des sources d'énergie verte. La production d'hydrogène provenant de l'électrolyse de l'eau alimentée par l'électricité solaire ou éolienne est un vecteur d'énergie abondante, propre et renouvelable. De plus, l'énergie renouvelable en surplus peut être stockée dans des carburants ou des produits chimiques plus complexes. Liée à l'électrolyse, l'électro-réduction du CO2 (CO2R) produit des hydrocarbures à haute densité énergétique qui stockent é

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19

Lê, Thi Kim-Chi. "Oxygen Reduction Reaction with Molybdenum-Containing Oxysulfide Nanoparticles : from Colloidal Synthesis to Surface Activity." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS209.pdf.

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Aujourd'hui, dans les véhicules individuels, les piles à combustible concurrencent les batteries Li-ion par de nombreux avantages. Donc, remplacer les métaux nobles par des métaux plus abondants dans des catalyseurs est essentiel pour les rendre abordables. Le molybdène peut être un bon candidat puisque certains composés (ex. MoS2, MoO2) ont une activité pour la réduction de l’oxygène (ORR). Les oxysulfures de molybdène, relativement méconnus, pourraient être utilisés comme électrodes pour les batteries Li-ion ou les catalyseurs grâce à leur structure poreuse sous formes amorphes (couches minc

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20

Wei, Hua. "Développement d'électrodes innovantes pour la conversion électrocatalytique de petites molécules." Thesis, Lyon, 2021. https://tel.archives-ouvertes.fr/tel-03789610.

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L'azote joue un rôle indispensable pour toute vie sur terre et pour le développement des êtres humains. À l'heure actuelle, la seule technologie de synthèse de l'ammoniac à l'échelle industrielle est le procédé mis au point par Haber et Bosch au début du XXe siècle, qui utilise les phases gazeuses N2 et H2. Cependant, le procédé Haber-Bosch nécessite des conditions difficiles, des équipements complexes et une consommation d'énergie élevée, et fonctionne avec de faibles taux de conversion, ce qui est incompatible avec les exigences d’un développement durable. Par rapport à la méthode Haber-Bosc

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21

Bechtold, Tamara [Verfasser]. "Model order reduction of electro-thermal MEMS / Tamara Bechtold." 2005. http://d-nb.info/975996134/34.

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22

Li, Hui. "Development of a continuous reactor for the electro-chemical reduction of carbon dioxide." Thesis, 2006. http://hdl.handle.net/2429/18548.

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A laboratory bench-scale continuous reactor has been developed for the electro-reduction of CO₂ to formate salts in aqueous solution. This novel reactor operated in the "trickle-bed" mode with co-current flow of reactant gas and catholyte liquid through a flow-by 3-D cathode, to overcome the twin problems of reactant supply and mass transfer limitation encountered in previous work on the electro-reduction of CO₂. Two single-cell electro-chemical reactors with cation membrane separators, Reactor A (150 mm long by 30 mm wide) and Reactor B (680 mm long by 50 mm wide), were constructed and used i

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23

Chen, Ying Cheng, and 陳應誠. "Electro-optic crystal modulated heterodyne interferometer and the reduction of its nonlinearity error." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/23597323674202889070.

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24

Chou, Shih-Cheng, and 周士程. "Core-Shell Co3O4@Pt on Functionalized Graphene for Oxygen Electro-Reduction in Alkaline Electrolytes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/qf57ck.

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碩士<br>國立交通大學<br>材料科學與工程學系所<br>106<br>This thesis research covers three different parts. The first part focuses on increasing the amount of oxidized functional groups on graphene sheets to improve the distribution and loading mass of metal oxide nanoparticles on carbon supports; in the second part, I synthesize Co3O4 electrocatalysts on functional graphene, identifying the nanocrystal by XRD analysis, observing the morphology and distribution by TEM, and measuring the electrocatalytic activity by electrochemical method; in the third part, I utilize a displacement reaction to form platinum shell

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25

Lee, How Chiang, and 李豪強. "Reduction of Nonlinear Distortions and Applications of Optical Bistability with Two-stage Electro-optic Modulator." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/32446854673439840723.

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26

GIUSI, DANIELE. "Development of Cu-based electrodes and cell design for photo- and electro-catalytic CO2 reduction." Doctoral thesis, 2021. http://hdl.handle.net/11570/3184194.

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Il processo di riduzione dell'anidride carbonica (CO2) ha suscitato negli ultimi anni grande attenzione nella comunità scientifica. Lo sviluppo di materiali e sistemi in grado di convertire H2O e CO2 in prodotti ad alto valore utilizzando energia rinnovabile e pulita, rappresenta una sfida particolarmente attraente per il prossimo futuro. In questo contesto, lo scopo del presente lavoro di Dottorato è stato quello di valutare diversi approcci, tra cui quelli foto- ed elettrocatalitici, per convertire la CO2 in sostanze chimiche e combustibili a più alto valore aggiunto. L'attività di ricerca

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27

Kirkpatrick, Robin Duncan. "The mechanism of antimicrobial action of electro-chemically activated (ECA) water and its healthcare applications." Thesis, 2009. http://hdl.handle.net/2263/25448.

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The Electrochemical Activation (ECA) of water is introduced as a novel refinement of conventional electrochemical processes and the unique features and attributes are evaluated against the universal principles that have described the electrolytic processes to date. While the novel and patented novel reactor design retains the capacity to generate products common to conventional electrolysis, it also manipulates the properties of the reagent solutions to achieve an anomalous Oxidation-Reduction potential (ORP or REDOX) that cannot be replicated by traditional chemical and physical interventions

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28

Chen, Margaret Ying Ting. "The in-situ brightening of pulp by the electro-reduction of oxygen, mediated with anthraquinone-2-sulfonic acid." Thesis, 1998. http://hdl.handle.net/2429/7834.

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A redox cycle involving anthraquinone 2-sulfonic acid - - denoted as AQS, and oxygen in an aqueous alkaline media was investigated for its ability to promote the in-situ electroreduction of oxygen to hydrogen peroxide with the coincident promotion of the brightening of thermo-mechanical pulp. Current applied at a carbon cloth cathode was used to reduce the AQS to hydroanthraquinone - - denoted as H₂AQS. The reaction of H₂AQS with oxygen was shown to produce hydrogen peroxide. Evidence presented in this study indicates the operation of a redox cycle involving AQS/ H₂AQS, oxygen and curren

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29

Zuluaga, Sebastian. "Computational Approach to the Problems of Electro- and Photo-Catalysis." Doctoral diss., 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6215.

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The main objective of this work is to gain basis for rational design of catalysts used in fuel cells for conversion of chemical energy stored in hydrogen molecules into electric energy, as well as photo-catalysts used for hydrogen production from water under solar irradiation. This objective is achieved by applying the first principles computational approach to reveal relationship among compositions of materials under consideration, their electronic structure and catalytic activity. A major part of the work is focused on electro-catalysts for hydrogen fuel cells. Platinum (Pt) is widely used

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30

Lo, Sheng-Tsai, and 羅聖才. "A study on Pt-Cu binary alloy catalyst and its relevance to electro reduction of oxygen for fuel cell applications." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/80091632994750146480.

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31

Subbiah, P. "Studies on the electrochemistry of organic compounds: process development in electro reduction of nitroso and nitro compounds and oxidation of sugars." Thesis, 1986. http://cecri.csircentral.net/2811/1/PH018.pdf.

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The present study deals with the basic voltammetric investigations, preparative experimental works and cell design aspects in the development of electrochemical processes for the preparation of unsymmetrical dimethyl hydrazine (UDMH), p-phenetidine (PP), Calcium gluconate (CG) and Calcium Lactobionate (CLB). The main cause for this state of affairs is primarily due to lack of a unified approach involving voltammetric studies, preparative experimental and proper cell design for each electrochemical process is necessary. The proper methodology for process development emphasizing the role of eac

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32

KUO, YEN-LIN, and 郭彥麟. "Feasibility of Electro-dewatering on Sludge Reduction in Conjunction of Life Cycle and Economic Efficiency Assessment :Case Study of Dihua Sewage Treatment Plant." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/32jf2y.

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碩士<br>國立臺北科技大學<br>土木工程系土木與防災碩士班<br>107<br>The increasing urbanization and population around the world lead to the increased demand for infrastructure and consumption of industrial water, which in turn results in the increased amount of wastewater and sludge to be treated. Take Taiwan as an example. It is estimated that the sludge to be treated will increased to 360 tons/day in 2020. For the development of sustainable city and its daily practice, it is necessary to deal with solid waste reduction and resource reuse with lower energy consumption. The development of this new technology and the ap

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Burela, Ramesh Gupta. "Asymptotically Correct Dimensional Reduction of Nonlinear Material Models." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/3996.

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This work aims at dimensional reduction of nonlinear material models in an asymptotically accurate manner. The three-dimensional(3-D) nonlinear material models considered include isotropic, orthotropic and dielectric compressible hyperelastic material models. Hyperelastic materials have potential applications in space-based inflatable structures, pneumatic membranes, replacements for soft biological tissues, prosthetic devices, compliant robots, high-altitude airships and artificial blood pumps, to name a few. Such structures have special engineering properties like high strength-to-mass ratio

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Burela, Ramesh Gupta. "Asymptotically Correct Dimensional Reduction of Nonlinear Material Models." Thesis, 2011. http://etd.iisc.ernet.in/2005/3909.

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This work aims at dimensional reduction of nonlinear material models in an asymptotically accurate manner. The three-dimensional(3-D) nonlinear material models considered include isotropic, orthotropic and dielectric compressible hyperelastic material models. Hyperelastic materials have potential applications in space-based inflatable structures, pneumatic membranes, replacements for soft biological tissues, prosthetic devices, compliant robots, high-altitude airships and artificial blood pumps, to name a few. Such structures have special engineering properties like high strength-to-mass ratio

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Gupta, Rimzhim. "An Approach Towards Inactivation of Susceptible and Antibiotic Resistant Bacterial Contamination using Novel Photo–(electro)-catalysts." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/4941.

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Water in most rivers in India does not meet the standards for drinking and even for bathing purposes due to the high concentration of coliforms, organic and inorganic contaminants. Overuse, uncontrolled release and careless disposal of drug, pharmaceutical components from hospital and domestic waste imparts a crucial role in developing a resistance towards antibiotics in microbes over a period of time. The class of bacteria affected by antibiotics are hereby called susceptible bacteria and the class that shows resistance towards antibiotics are known as antibiotic resistant bacteria. Therefore

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36

(10701084), James Lawrence Stewart. "Designing Optical Metastructures for IR Sensing, Discernment and Signature Reduction." Thesis, 2021.

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<div>Increasing flexibility of light manipulation is vital for various domains including both biomedical and military applications, where a lack of photon control could become critical. The efforts conducted and projected within this proposal are focused on three major areas: semi-continuous planar thin film photomodification for infrared (IR) filtering, nanosphere core-shell structures for obscurance, and all-dielectric sub-wavelength focal lenses for advanced IR sensing.Through a collaborative effort with the Army Research Office, we advanced the tunability of planar plasmonic filters w

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37

WEI, Hua. "Development of Innovative Electrodes for the Electrocatalytic Conversion of Small Molecules." Doctoral thesis, 2021. http://hdl.handle.net/11570/3191397.

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L'azoto gioca un ruolo indispensabile per la vita sulla terra e per lo sviluppo degli esseri umani. Industrialmente, è necessario convertire l'azoto gassoso in ammoniaca (NH3) per la produzione di fertilizzanti, in modo da integrare la quantità di azoto fissata spontaneamente in natura. Attualmente, l'unica tecnologia di sintesi dell'ammoniaca su scala industriale è il processo sviluppato da Haber e Bosch all'inizio del XX secolo che utilizza N2 e H2 come gas di alimentazione. Tuttavia, il processo Haber-Bosch richiede condizioni molto drastiche, apparecchiature complesse e porta ad un elevato

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