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Tesis sobre el tema "Anodic electrocatalysts"

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Publicado: 22 de febrero de 2025
Última modificación: 31 de julio de 2025

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1

Chen, Dayi. "Nickel-based anodic electrocatalysts for fuel cells and water splitting." Thesis, The University of Utah, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10157943.

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<p> Our world is facing an energy crisis, so people are trying to harvest and utilize energy more efficiently. One of the promising ways to harvest energy is via solar water splitting to convert solar energy to chemical energy stored in hydrogen. Another of the options to utilize energy more efficiently is to use fuel cells as power sources instead of combustion engines. Catalysts are needed to reduce the energy barriers of the reactions happening at the electrode surfaces of the water-splitting cells and fuel cells. Nickel-based catalysts happen to be important nonprecious electrocatalysts fo
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2

Terry, Alexandre. "New mixed 3d metal-based oxyfluorinated materials as anodic catalysts for water splitting : from elaboration to mechanistic study." Electronic Thesis or Diss., Le Mans, 2024. https://cyberdoc-int.univ-lemans.fr/Theses/2024/2024LEMA1029.pdf.

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Si l'hydrogène est un vecteur énergétique prometteur pour le stockage durable de l'énergie, sa production doit reposer sur des technologies sans carbone. L’électrolyse de l’eau qui consiste à dissocier l'eau via un courant électrique issu d’énergies renouvelables est idéal pour produire un hydrogène vert. Toutefois, ce processus est entravé par une cinétique lente de la réaction OER (Oxygen Evolution Reaction, 2H2O ⇋ O2 + 4H+ + 4e-) à l'anode, nécessitant un apport d’énergie supplémentaire pour assurer un rendement énergétique satisfaisant. Ainsi, des catalyseurs, généralement des oxydes d'iri
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3

McIntyre, Dale R. "Non-noble electrocatalysts for anodes in fuel cells with acidic electrolytes." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620481.

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4

St, John Samuel. "Hierarchical Electrocatalyst Structure Control to Study Cathodic and Anodic Overpotential in Proton Exchange Membrane Fuel Cells." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384334674.

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5

Gcilitshana, Oko Unathi. "Electrochemical Characterization of Platinum based anode catalysts for Polymer Exchange Membrane Fuel Cell." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5972_1266961431.

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<p>In this study, the main objective was to investigate the tolerance of platinum based binary anode catalysts for CO poisoning from 10ppm up to1000ppm and to identify the<br /> best anode catalysts for PEMFCs that tolerates the CO fed with reformed hydrogen.</p>
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6

Zellner, Michael. "Tungsten carbides as potential alternative direct methanol fuel cell anode electrocatalysts." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 213 p, 2006. http://proquest.umi.com/pqdweb?did=1172119451&sid=5&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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7

Ren, Qiao. "Tungsten carbides as anode electrocatalyst of direct methanol fuel cell." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 97 p, 2007. http://proquest.umi.com/pqdweb?did=1400426011&sid=12&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Thesis (M.S.)--University of Delaware, 2007.<br>Principal faculty advisors: Jingguang G. Chen, Dept. of Chemical Engineering; and Thomas P. Beebe, Jr., Dept. of Chemistry & Biochemistry. Includes bibliographical references.
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8

Kavanagh, R. J. "A computational study of anode electrocatalysis in direct ethanol fuel cells." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678702.

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Density Functional Theory calculations are employed in the investigation of the ethanol oxidation reaction (EOR) at the anode of Direct Ethanol Fuel Cells (DEFC), with a view to mechanistic understanding of the reaction pathways, determination of the factors governing the onset potential of activity and selectivity towards C02, and ultimately the design of an optimal electrocatalyst in these regards. The lowest energy pathway of ethanol decomposition on platinum is identified and it is found that the reaction kinetics do not significantly vary with catalyst morphology. The aqueous medium is fo
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9

Shingleton, Anthony. "An electrochemical and physical study of chlorine electrocatalysis on commercial RuO₂/TiO₂ anodes." Thesis, University of Bath, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307129.

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10

Gu, Ping. "Behaviour of the adsorbed chloride intermediate in electrocatalysis of anodic chlorine evolution at oxide film surfaces at platinum and ruthenium." Thesis, University of Ottawa (Canada), 1990. http://hdl.handle.net/10393/5847.

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In this thesis, the investigation of the mechanism of chlorine evolution reaction at (i) both freshly reduced and pre-oxidized Pt electrodes; (ii) RuO$\sb2$-TiO$\sb2$ electrodes (DSA); (iii) other noble metals such as Pd, Ir, Ru and Rh by means of computer controlled anodic polarization, potential-relaxation transients and a.c. impedance measurements, will be presented. As described in Chapter V, the influence of co-deposited OH and O species in the surface oxidation process on the extent of chemisorption of the Cl$\sp-$ intermediate in the Cl$\sb2$ evolution reaction has been carefully examin
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11

SILVA, DIONISIO F. da. "Preparacao de eletrocatalisadores PtRu/C e PtSn/C utilizando feixe de eletrons para aplicacao como anodo na oxidacao direta de metanol e etanol em celulas a combustivel de baixa temperatura." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9475.

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Made available in DSpace on 2014-10-09T12:27:08Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:56:45Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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12

Olu, Pierre-Yves. "Etude de l'anode pour la pile à combustible directe aux borohydrures." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI101/document.

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Le travail présenté dans cette thèse porte sur l'anode de la pile à combustible directe aux borohydrures (DBFC, selon l'acronyme anglais). Une première approche pour développer l'anode de la DBFC est d'étudier cette anode à l'intérieur du système global de la DBFC. Dans cette optique, des anodes composées des catalyseurs Pt/C et Pd/C ont été caractérisée en banc de test DBFC. D'autres facteurs ont aussi été étudiés, tels que la morphologie de l'anode et la stabilité des nanoparticules des catalyseurs.Le catalyseur d'anode de la DBFC doit idéalement exhiber une activité catalytique suffisante p
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13

Yu, Zhiqiang. "Transient Studies of Ni-, Cu-Based Electrocatalysts in CH4 Solid Oxide Fuel Cell." Akron, OH : University of Akron, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1194625466.

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Dissertation (Ph. D.)--University of Akron, Dept. of Chemical Engineering, 2007.<br>"December, 2007." Title from electronic dissertation title page (viewed 03/12/2008) Advisor, Steven S. C. Chuang; Committee members, Lu-Kwang Ju, Edward Evans, W. B. Arbuckle, Stephen Z. D. Cheng; Department Chair, Lu-Kwang Ju; Dean of the College, George K. Haritos; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
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14

ROSESTOLATO, Davide. "Chemical and Physical Characterization of Electrocatalysts based on Iridium Oxide and prepared by Sol-Gel and Physical Vapor Deposition." Doctoral thesis, Università degli studi di Ferrara, 2014. http://hdl.handle.net/11392/2389035.

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15

ANTONIASSI, RODOLFO M. "Desempenho elétrico e distribuição dos produtos da célula a combustível com etanol direto utilizando Pt/C, PtSn/C(liga) e PtSnO2/C como eletrocatalisadores anódicos." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10515.

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Made available in DSpace on 2014-10-09T12:41:23Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:56Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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16

Xaba, Nqobile. "Development of Anode Materials Using Electrochemical Atomic Layer Deposition (E-ALD) for Energy Applications." University of the Western Cape, 2018. http://hdl.handle.net/11394/6390.

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Philosophiae Doctor - PhD (Chemistry)<br>Nanomaterials have been found to undeniably possess superior properties than bulk structures across many fields of study including natural science, medicine, materials science, electronics etc. The study of nano-sized structures has the ability to address the current world crisis in energy demand and climate change. The development of materials that have various applications will allow for quick and cost effective solutions. Nanomaterials of Sn and Bi are the core of the electronic industry for their use in micro packaging components. These nanomaterial
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17

Oliveira, Gustavo Rodrigues de. "Concilia??o entre modelos de mecanismos avan?ados de oxida??o eletroqu?mica." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17674.

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Made available in DSpace on 2014-12-17T15:42:00Z (GMT). No. of bitstreams: 1 GustavoRO_DISSERT.pdf: 3063056 bytes, checksum: e0fe7867cfaf62acb3ba439a1526cef3 (MD5) Previous issue date: 2012-07-27<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Many pollutants dumped in waterways, such as dyes and pesticides, have become so ubiquitous that they represent a serious threat to human health. The electrochemical oxidation is presented as an alternative clean, efficient and economic degradation of wastewater containing organic compounds and a number of advantages of this technique
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18

Silva, Dionisio Furtunato da. "Preparação de eletrocatalisadores PtRu/C e PtSn/C utilizando feixe de elétrons para aplicação como anodo na oxidação direta de metanol e etanol em células a combustível de baixa temperatura." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-23092011-155927/.

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Foram preparados eletrocatalisadores PtRu/C e PtSn/C utilizando feixe de elétrons para a redução dos íons metálicos em solução. Neste procedimento submeteu-se ao feixe de elétrons, sob agitação, soluções de água/etileno glicol (EG) e água/2- propanol, ambas contendo íons dos metais precursores e o suporte de carbono. Foram variadas as razões volumétricas água/2-propanol e água/etileno glicol, a razão atômica entre os metais, o tempo de irradiação e a taxa de dose. Os eletrocatalisadores obtidos foram caracterizados por análise de raios X por energia dispersiva (EDX), por difração de raios X (D
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19

ANTONIASSI, RODOLFO M. "Preparação de nanopartículas de platina com diferentes morfologias nos materiais Pt/C e PtSnO2/C para aplicação como ânodo em células a combústível de etanol direto." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28036.

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Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-11-22T16:42:40Z No. of bitstreams: 0<br>Made available in DSpace on 2017-11-22T16:42:40Z (GMT). No. of bitstreams: 0<br>Neste trabalho foi estudado o efeito da adição de íons haletos (Cl-, Br- e I-) sobre a morfologia das nanopartículas de Pt na produção de catalisadores de Pt/C e PtSnO2/C. Foi desenvolvida uma metodologia de síntese simples capaz de produzir nanopartículas de Pt predominantemente cúbicas com orientação preferencial Pt(100), diretamente suportadas em carbono sem o uso de agentes estabilizantes. Brometo de potássio foi u
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20

Lyke, Stephen Erwin. "Anodic oxidation of sulfur dioxide electrocatalysis and reactor performance analysis /." 1991. http://catalog.hathitrust.org/api/volumes/oclc/24296873.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1991.<br>Vita. Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 261-278).
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21

Li, Hua-Wun, and 李華文. "Experimental Study on Hull Biofouling Prevention Using Dimensional Stable Anode Electrocatalyst." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/42tjwn.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>106<br>Abstract Hull fouling will increase the resistance of the ship while driving, and the increase in fuel consumption will also cause hull corrosion. Electro-Catalytic electrolysis of seawater to produce chlorine (Cl) or hypochlorite ions (ClO-), strong oxidizing forces to eliminate bacteria and micro-oganism, inhibit the growth of micro-oganism, the low voltage electrode method is applies direct current, the use of low voltage electrode method transfer electronic and catalytic between the hydroxyl radical, destroy or reduce the adhesion of microbial, inhibi
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22

Wong, Chee-Yong, and 黃致榮. "Effect of organic acid on the electrocatalyst activity of PEMFC anode." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/09315054437572459686.

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碩士<br>逢甲大學<br>綠色能源科技碩士學位學程<br>102<br>A comprehensive study has been made to explore the role of organic acids on electrocatalytic performances of platinum (Pt) nanoparticles supported on carbon porous materials (CPMs) in proton exchange membrane fuel cells (PEMFCs). In particular, the effects of carboxylic acids (R-COOH), viz. formic acid, acetic acid, propionic acid, and butyric acid on catalytic activity, stability, and durability of anodic Pt/CPM electrocatalyst in direct methanol fuel cells (DMFCs) were investigated. In the presence of doped carboxylic acids, the electrooxidative activity
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23

Guo, Mann-Charn, and 郭蔓嬋. "Adding metal oxides in Pt anode electrocatalysts for enhancing CO tolerance in proton exchange membrane fuel cells." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/81445252234693930210.

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碩士<br>國立中興大學<br>環境工程學系所<br>100<br>The aim of this study is to discuss the preparation of the membrane-electrode assembly (MEA) by using carbon nanotubes (CNTs) in proton exchange membrane fuel cell (PEMFC). Different pretreatment procedures of carbon supports are also considered to evaluate the catalytic activity with various catalysts. Besides, the addition of metal oxides such as CeO2、ZrO2 and SnO2 are investigated to enhance the electrocatalytic activity and the tolerance of different CO concentrations. All catalysts are characterized by means of FESEM, TEM, XRD, BET and ESCA. The experimen
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24

Lee, Eungje. "Development of anode catalysts for direct alcohol fuel cells." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1708.

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Direct alcohol fuel cells (DAFC) are attracting considerable interest to meet a variety of energy needs as they offer higher efficiency with less pollution compared to other conventional energy-conversion devices. However, the sluggish alcohol oxidation reaction kinetics and durability problems of the conventional Pt-Ru anode catalyst hamper the commercialization of the DAFC systems. With an aim to overcome these problems, there have been intensive efforts to alloy Pt-Ru with other metals. Although such strategies have led to some enhancement in activity, the durability problem caused by the i
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25

Ke, Hsin-Yu, and 柯心喻. "Preparation of PtRuTa/C electrocatalysts for improving the stability of Pt-Ru based anodes for use in direct methanol fuel cell." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/50608101586068757478.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系<br>100<br>PtRuTa/C tri-metal electrocatalysts were prepared by impregnation method for use as anode catalysts, with an attempt to improve the stability and electrocatalytic activity of the PtRu for methanol oxidation reaction (MOR). The lattice parameters, composition, and particle size distribution of catalysts were characterized by the means of X-ray diffractometer (XRD), X-ray energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and scanning electron microscope (SEM), respectively. The electroche
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26

Yu-WeiHuang and 黃裕暐. "Syntheses and Characterizations of Electrocatalyst of Pt Loaded on a Three Dimensional Graphene Grown with Carbon Nanotubes for Anode of DMFCs." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/66207964662607920022.

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27

Coletti, Kathryn. "Development of a model for the investigation of the role of mixed conduction in a solid oxide fuel cell anode to enable effectiveness of electrocatalyst infiltration." Thesis, 2020. https://hdl.handle.net/2144/41469.

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Despite their potential for high efficiency energy production, the high temperature at which solid oxide fuel cells (SOFCs) must operate places significant restraints on materials selection which in turn limits the power density. Liquid infiltration of nickel nanoparticle catalysts into the anode can produce a higher density of reaction sites and has been shown to improve cell performance at significantly lower operating temperatures. Not all of these nanoparticles are connected to the Ni web network that provides a pathway for electron conduction to the external circuit, yet they improve the
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