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Relevant bibliographies by topics / Fuel cells ; Electrocatalysis / Dissertations / Theses

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Dissertations / Theses on the topic 'Fuel cells ; Electrocatalysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Lively, Treise. "Ethanol fuel cell electrocatalysis : novel catalyst preparation, characterization and performance towards ethanol electrooxidation." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602560.

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2

Williams, Mario. "Characterization of platinum-group metal nanophase electrocatalysts employed in the direct methanol fuel cell and solid-polymer electrolyte electrolyser." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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3

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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4

Hui, Chiu Lam. "Surfactant stabilized nanoscale electrocatalysts for fuel cell applications /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202005%20HUI.

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5

Haslam, Gareth Eric. "Ni-C and WC materials as fuel cell electrocatalysts." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610113.

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6

Fahy, Kieran. "Base-material electrocatalysts for oxygen reduction in low temperature fuel cells." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707964.

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7

Rees, Eric John. "The role of synthesis conditions for metal-carbide electrocatalysts in fuel cells." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609023.

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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

Barron, Olivia. "Catalyst Coated Membranes (CCMs) for polymerelectrolyte Membrane (PEM) fuel cells." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_4757_1307336145.

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<p>The main objective of this work it to produce membrane electrode assemblies (MEAs) that have improved performance over MEAs produced by the conventional manner, by producing highly efficient, electroactive, uniform catalyst layers with lower quantities of platinum electrocatalyst. The catalyst coated membrane (CCM) method was used to prepare the MEAs for the PEM fuel cell as it has been reported that this method of MEA fabrication can improve the performance of PEM fuel cells. The MEAs performances were evaluated using polarisation studies on a single cell. A comparison of polarisation curv

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10

Feng, Chunhua. "Microfabrication-compatible synthesis strategies for nanoscale electrocatalysts in microfabricated fuel cell applications /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CENG%202007%20FENG.

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11

Kumar, Sachin. "Electrocatalysis at Metal Nanoparticles." Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1218138524.

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12

Ziegelbauer, Joseph M. "Fundamental aspects of oxygen reduction reaction on non-platinum electrocatalysts an electrochemical and in situ X-ray absorption spectroscopy study : a dissertation /." View dissertation online, 2007. http://hdl.handle.net/2047/d10016211.

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13

Sode, Aya. "Electrocatalysis on PtZn surface - fundamental studies and the applications in PEM fuel cells." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/5582.

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The PtZn alloy was characterized and studied as a possible candidate for proton exchange membrane fuel cells (PEMFCs). Zn was electrochemically deposited on a bulk Pt substrate and the alloy was spontaneously formed at ambient conditions, as confirmed by Auger electron spectroscopy (AES). PtZn decreased the oxygen reduction reaction (ORR) overpotential by 30 mV with respect to that measured for Pt. The alloy was also prepared in a similar manner on a membrane electrode assembly (MEA) and studied in a single stack fuel cell. The PtZn MEA also showed an improved performance compared to the Pt ME

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14

Chin, Xiao Yao. "Ni-C electrocatalysts for hydrogen oxidation in low-temperature acidic fuel cells." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610637.

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15

Coleman, Eric James. "Robust Platinum-Based Electrocatalysts for Fuel Cell Applications." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437484946.

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16

Sneed, Brian Thomas. "Synthesis of Strained Metal Nanocrystal Architectures for Energy Conversion Electrocatalysis." Thesis, Boston College, 2015. http://hdl.handle.net/2345/bc-ir:104488.

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Thesis advisor: Chia-Kuang F. Tsung<br>Thesis advisor: Dunwei Wang<br>In order to understand the lattice strain effect and its relationship to size, shape, composition, and catalytic performance, novel well-defined nanocrystal archetypes were designed and synthesized by taking advantage of wet chemical, seed-mediated (mild) reduction routes developed by our lab. First, the current synthesis challenges are addressed in creating smaller monometallic shape-controlled metal nanocrystals, and novel cuboctopods via a hybrid nanoparticle stabilizer. A look at the relationship between lattice strain a

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17

Blavo, Selasi Ofoe. "Model Pt- and Pd-based Electrocatalysts for Low Temperature Fuel Cells Applications." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4639.

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In the search for alternative energy technologies, low temperature fuel cells continue to feature as technologies with the most promise for mass commercialization. Among the low temperature fuel cells, alkaline and proton exchange membrane fuel cells are the most popular. Alkaline fuel cells have typically been used for water generation as well as auxiliary power for space shuttles. Their bulkiness however makes them undesirable for other applications, especially in automobiles, where there is a great demand for alternative technologies to internal combustion engines. Proton exchange membrane

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18

Piet, Marvin. "Synthesis and characterization of cathode catalysts for use in direct methanol fuels cells." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3065_1307691154.

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<p>In this work a modified polyol method was developed to synthesize in-house catalysts. The method was modified for maximum delivery of product and proved to be quick and efficient as well as cost effective. The series of IH catalysts were characterized using techniques such as UV-vis and FT-IR spectroscopy, TEM, XRD, ICP and CV.</p>

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19

Kurak, Kiera A. "Selenium and Nitrogen-Doped Graphite Elecetrocatalyst Studies for a Proton Exchange Membrane Fuel Cell." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1298570837.

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20

Mostafa, Ehab [Verfasser]. "Electrocatalysis and Kinetics of the Direct Alcohol Fuel Cells : DEMS and ac Voltammetry Studies / Ehab Mostafa." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/104486804X/34.

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21

De, A. L. Viana Hermenegildo. "Characterisation of proton conducting oxide materials for use in reverse water gas shift catalysis and solid oxide fuel cells /." St Andrews, 2008. http://hdl.handle.net/10023/429.

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22

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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23

Lopes, Pietro Papa. "Aproveitamento de etanol em células a combustível: eletrocatálise da reação de oxidação direta e da oxidação do hidrogênio contaminado por CO obtido por sua reforma." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-04072013-152007/.

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Este trabalho compreende estudos das reações de oxidação de hidrogênio na presença de CO em células unitárias do tipo Membrana Trocadora de Prótons e da reação de oxidação de álcoois em meio alcalino em superfícies monocristalinas. Estes dois temas têm como base a utilização de etanol como vetor energético renovável para o uso em dispositivos eletroquímicos conversores de energia, como as células a combustível. O estudo do efeito de temperatura sobre a tolerância ao CO durante a reação de oxidação de hidrogênio foi abordado sob a perspectiva dos diferentes processos de tolerância que ocorrem

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24

Carbonio, Emilia Andrea. "Síntese e caracterização de nanopartículas do tipo M-MxSy (M = Pt, Rh) suportadas em carbono para eletrocatálise em reações de células a combustível." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-17042012-115001/.

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As Células a combustível são conversores de energia química em energia elétrica. As Células do tipo PEM que funcionam com metanol como combustível tem uma ampla variedade de aplicações. Os materiais utilizados como eletrocatalisadores nas células são responsáveis por uma grande parte do custo das mesmas. Outros problemas, que provocam diminuição da eficiência da célula, são a cinética lenta da reação de redução de oxigênio (RRO) e o potencialmisto gerado devido ao cruzamento de metanol através da membrana. Neste trabalho apresenta-se um estudo de catalisadores do tipo M-MxSy (M = Pt, Rh) para

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25

Rocha, Thairo de Araújo. "Catalisadores a base de platina e nióbio para o ânodo da célula a combustível de membrana trocadora de prótons alimentada com alcoóis de baixa massa molecular." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-17042012-164635/.

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Neste trabalho descreve-se o estudo das reações de oxidação eletroquímica de metanol e etanol em catalisadores contendo platina (Pt) e Nióbio (Nb) suportados em carbono de alta área superficial. Os materiais estudados foram PtNb/C, Pt-Nb2O5(amorfo)/C e Pt-Nb2O5(cristalino) /C, utilizando-se como padrão para comparação o catalisador comercial Pt/C E-TEK 20 %. A caracterização física foi realizada com o auxílio das técnicas de Difração de Raios X (DRX), Espectroscopia por Energia Dispersiva de Raios X (EDX) e Espectroscopia de Absorção de Raios X (XAS). A partir dos picos de difração foi possíve

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26

Zhang, Jingxin. "Investigation of CO tolerance in proton exchange membrane fuel cells." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0708104-193007/.

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27

Mkhohlakali, Andile Cyril. "Development of nanostructured electrocatalysts using electrochemical atomic layer deposition technique for the direct liquid fuel cells By." University of Western Cape, 2020. http://hdl.handle.net/11394/7346.

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Philosophiae Doctor - PhD<br>The depletion of fossil fuel resources such as coal and the concern of climatic change arising from the emission of greenhouse gases (GHG) and global warming [1] lead to the identification of the 'hydrogen economy' as one of the renewable energy sources and possible futuristic energy conversion solution. Sources of hydrogen as fuel such as water through electrolysis and liquid organic fuel (Hydrogen carriers) have been found as potential game-changers and received increased attention, due to its low-carbon emission.

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28

Lima, Fabio Henrique Barros de. "\"Desenvolvimento de eletrocatalisadores dispersos para o cátodo de células a combustível alcalinas\"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-11042007-143819/.

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A cinética da reação de redução de oxigênio (RRO) foi estudada em eletrólito alcalino em diferentes eletrocatalisadores. As atividades eletrocatalíticas medidas experimentalmente em metais puros foram correlacionadas com propriedades eletrônicas do eletrocatalisador, como o centro em energia da banda d (εd). A RRO também foi investigada em Pt e Ag modificados pela formação de liga com outros metais de transição. Por fim, a RRO foi conduzida em diferentes óxidos de manganês sintetizados em laboratório, com o objetivo de se determinar a fase mais ativa e o mecanismo da reação nos diferentes

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29

Rêgo, Ulisses Alves do. "Redução do Oxigênio Molecular por [Fe(Bipy)3]/C: influência do suporte e do tratamento térmico na atividade catalítica." Universidade Federal do Maranhão, 2011. http://tedebc.ufma.br:8080/jspui/handle/tede/1560.

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Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-06-02T18:25:24Z No. of bitstreams: 1 UlissesRego.pdf: 1474234 bytes, checksum: a8cb075e16a2eff24833d0907c52e571 (MD5)<br>Made available in DSpace on 2017-06-02T18:25:24Z (GMT). No. of bitstreams: 1 UlissesRego.pdf: 1474234 bytes, checksum: a8cb075e16a2eff24833d0907c52e571 (MD5) Previous issue date: 2011-01-25<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPQ)<br>This work consisted in the preparation and study of catalytic activity for reduction of molecular oxygen (ROM) based on head-treated coordination c

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30

Schwämmlein, Jan Nicolas [Verfasser], Hubert A. [Akademischer Betreuer] Gasteiger, Matthias [Gutachter] Arenz, Kai-Olaf M. [Gutachter] Hinrichsen, and Hubert A. [Gutachter] Gasteiger. "Performance and Durability of Ion Exchange Membrane Fuel Cells – From Electrocatalysis to Single Cells / Jan Nicolas Schwämmlein ; Gutachter: Matthias Arenz, Kai-Olaf M. Hinrichsen, Hubert A. Gasteiger ; Betreuer: Hubert A. Gasteiger." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1222161672/34.

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31

Zhu, Chengzhou, Dan Wen, Martin Oschatz, et al. "Kinetically controlled synthesis of PdNi bimetallic porous nanostructures with enhanced electrocatalytic activity." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-208520.

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32

Klinsrisuk, Sujitra. "Novel electrocatalytic membrane for ammonia synthesis." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1294.

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Novel ceramic membrane cells of BaCe₀.₅Zr₀.₃Y₀.₁₆Zn₀.₀₄O[subscript(3-δ)] (BCZYZ), a proton-conducting oxide, have been developed for electrocatalytic ammonia synthesis. Unlike the industrial Haber-Bosch process, in this work an attempt to synthesise ammonia at atmospheric pressure has been made. The membrane cell fabricated by tape casting and solution impregnation comprises of a 200 μm-thick BCZYZ electrolyte and impregnated electrode composites. Electrocatalysts for anode and cathode were investigated. For the anode, the co-impregnation of Ni and CeO₂ provided excellent electrode performance

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33

De, A. L. Viana Hermenegildo. "Characterisation of proton conducting oxide materials for use in reverse water gas shift catalysis and solid oxide fuel cells." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/429.

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This study concerned the preparation, characterisation and evaluation of different proton conductors for the Reverse Water Gas Shift Reaction (RWGS) and their evaluation as electrolytes for Solid Oxide Fuel Cells (SOFC) under H₂ and O₂. Materials with both catalytic and conductive properties are of a great interest, as their use in electrocatalytical systems may be very important. Sr₃CaZr₀.₅Ta₁.₅O₈.₇₅ (SCZT), BaCe₀.₉Y₀.₁O₂.₉₅ (BCY10) and Ba₃Ca₁.₁₈Nb₁.₈₂O₈.₇₃ (BCN18), were the initial materials in this study. Thermogravimetric analysis under different atmospheres (5%H₂/Ar, Ar, 5%CO₂, etc), were

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34

Gonçalves, Bruna Rodrigues Lopes [UNESP]. "Estudo da eletrocatálise da reação de oxidação do glicerol sobre as fases intermetálicas ordenadas PtSn e AuSn." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/88457.

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Made available in DSpace on 2014-06-11T19:23:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-28Bitstream added on 2014-06-13T18:09:39Z : No. of bitstreams: 1 goncalves_brl_me_bauru.pdf: 1866198 bytes, checksum: 6cb837c9d2ac03ec4728070b23227b74 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Atualmente, as mudanças climáticas e a questão energética tem sido tema de grande interesse e discussões mundiais. Assim, um número crescente de novas tecnologias verdes tem sido propostas para transformar o modo como a energia é produzida, distribuída e consum

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35

Silva, Gabriel Christiano da. "Estudo do desempenho e estabilidade de catalisadores Pt-Y/C em cátodo de célula a combustível." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-06052015-110905/.

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Os problemas ambientais originados pela produção e consumo das tradicionais fontes de energia pressionam a sociedade pelo desenvolvimento e utilização de fontes de energia limpas e renováveis. Dentre as novas tecnologias, células a combustível de membrana de troca protônica (PEMFC) apresentam-se como uma alternativa viável, aliando elevadas taxas de conversão energética a níveis mínimos de poluentes gerados. No entanto, a utilização plena desses dispositivos depende de fatores como desempenho, estabilidade e custo dos mesmos. Um dos principais elementos que afeta o desempenho de uma PEMFC é a

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36

Jain, Deeksha. "Development of Alternative Materials to Replace Precious Metals in Sustainable Catalytic Technologies." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1566176607919202.

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37

Bonnin, Egilda Purusha. "Electrolysis of Ammonia Effluents: A Remediation Process with Co-generation of Hydrogen." Ohio : Ohio University, 2006. http://www.ohiolink.edu/etd/view.cgi?ohiou1156435340.

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38

Martino, Drew J. "Evaluation of Electrochemical Storage Systems for Higher Efficiency and Energy Density." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/470.

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Lack of energy storage is a key issue in the development of renewable energy sources. Most renewables, especially solar and wind, when used alone, cannot sustain a reliably constant power output over an extended period of time. These sources generally generate variable amounts of power intermittently, therefore, an efficient electrical energy storage (EES) method is required to better temporally balance power generation to power consumption. One of the more promising methods of electrical energy storage is the unitized regenerative fuel cell (UFRC.) UFRCs are fuel cells that can operate in a c

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39

Jacob, Juliana Marciotto. "Efeito da adição de cério em catalisadores Pt/C e PtSn/C para eletro-oxidação de etanol." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-04072014-121032/.

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Neste trabalho foi estudado o efeito da presença do cério em catalisadores de Pt/C e PtSn/C para eletro-oxidação de etanol visando aumentar a eficiência da reação, entender o motivo das variações na atividade catalítica e avaliar a estabilidade destes catalisadores nas condições de operação da célula. Todos os catalisadores foram preparados pelo método do ácido fórmico, os dados de espectroscopia XPS confirmaram as porcentagens nas composições dos catalisadores de PtCe/C e PtSnCe/C. Através das técnicas de TEM e XRD verificou-se que, com exceção da proporção PtCe/C 50:50, todos os outros catal

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40

Carvalho, Dayvid Pires. "ELETROCATALISADORES À BASE DE Fe,Co(10%m)-N(PAR,PAN)/C(500-900 ºC) PARA A REDUÇÃO DO OXIGÊNIO MOLECULAR." Universidade Federal do Maranhão, 2014. http://tedebc.ufma.br:8080/jspui/handle/tede/991.

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Made available in DSpace on 2016-08-19T12:56:47Z (GMT). No. of bitstreams: 1 Dissertacao Dayvid Pires Carvalho.pdf: 1761645 bytes, checksum: 3ce6a737d230555532aeb362666c27c3 (MD5) Previous issue date: 2014-08-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In order to develop a new Pt-free reducing agents for oxygen reduction reaction (ORR), the ligands 1 - (2-Pyridylazo)-2-naphthol (PAN) and 4-(2-pyridylazo)-resorcinol (PAR) were studied as nitrogen sources complexing with Fe (II) and Co (II) ions, supported on carbon nanoparticles (10 wt. % metal loading) and heat tr

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41

Corradini, Patricia Gon. "Efeito da adição de praseodímio em catalisadores de Pt e PtSn/C para eletro-oxidação de etanol." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-20032013-102655/.

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O efeito da presença do praseodímio em catalisadores de Pt/C e PtSn/C para eletro-oxidação de etanol foi estudado neste trabalho. Os principais objetivos foram estudar alterações na rota sintética da metodologia do ácido fórmico, visando catalisadores com propriedades físico-químicas que aumentem a eficiência frente a reação de oxidação de etanol; entender o motivo das variações na atividade catalítica; e avaliar a estabilidade dos catalisadores nas condições de operação da célula. A atmosfera de síntese dos catalisadores de PtPr/C influencia fortemente as atividades catalíticas destes materia

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42

Guenot, Benoit. "Etude de matériaux catalytiques pour la conversion électrochimique de l'énergie Clean hydrogen generation from the electrocatalytic oxidation of methanol inside a proton exchange membrane electrolysis cell (PEMEC): effect of methanol concentration and working temperature Electrochemical reforming of Dimethoxymethane in a Proton Exchange Membrane Electrolysis Cell: a way to generate clean hydrogen for low temperature fuel cells." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2017. http://www.theses.fr/2017ENCM0004.

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L’hydrogène est un vecteur énergétique prometteur réalisant une très bonne synergie avec l’exploitation des sources d’énergie intermittentes telles que le solaire ou l’éolien. Le développement de ses moyens de production et de conversion électrochimique représente un enjeu majeur dans le contexte de transition énergétique dans lequel nous vivons aujourd’hui. Les piles à combustible et les électrolyseurs utilisant la technologie PEM (Membrane Echangeuse de Protons) sont des systèmes électrochimiques de conversion de l’énergie matures tandis que les systèmes réversibles capables de remplir ces d

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43

DRESCH, MAURO A. "Aplicação de catalisadores PtSn/C e membranas Nafion-SiOsub(2) em células a combustível de etanol direto em elevadas temperaturas." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10633.

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Made available in DSpace on 2014-10-09T12:42:37Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:01:33Z (GMT). No. of bitstreams: 0<br>Tese (Doutorado em Tecnologia Nuclear)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Lopes, Pietro Papa. "Estudos da reação de oxidação de hidrogênio na presença de CO no sistema eletrocatalítico Pt-Ru/C." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-25082009-105950/.

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Neste trabalho são apresentados resultados de estudos dos efeitos do pH e da atmosfera de síntese de eletrocatalisadores de Pt/C, Ru/C e PtRu/C sobre suas propriedades catalíticas frente à reação de oxidação de hidrogênio (ROH) na presença de CO. Também são comparados os desempenhos destes materiais em configurações eletródicas de misturas físicas de Pt/C + Ru/C, com o intuito de caracterizar o papel de cada catalisador sobre o mecanismo de tolerância ao CO, sobre fenômenos de oscilação do potencial anódico e sobre a produção transiente de metano, particularmente nos materiais de Ru/C. Em conj

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Hamer, P. "Electrocatalysis towards direct fuel cell applications." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676493.

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The aim of this thesis is an in depth study of electro-oxidation of ethanol, but also that of alternate fuels to allow a direct comparison under a range of conditions. Polycrystalline metal electrodes are used in a half cell set up as model environment for the electrochemical studies of several catalytic surfaces. Due to the limited research that has been carried out, for the first time chapters 3 and 4 of the thesis provide electrochemical studies into the electro oxidation of ethanol, ethylene glycol, acetaldehyde and acetic acid on polycrystalline rhodium while simultaneously studying tempe

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Gonçalves, Bruna Rodrigues Lopes. "Estudo da eletrocatálise da reação de oxidação do glicerol sobre as fases intermetálicas ordenadas PtSn e AuSn /." Bauru : [s.n.], 2010. http://hdl.handle.net/11449/88457.

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Orientador: Antonio Carlos Dias Ângelo<br>Banca: Luiz Henrique Dall'Antonia<br>Banca: Joelma Perez<br>O Programa de Pós-Graduação em Ciência e Tecnologia de Materiais, PosMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi da Unesp<br>Resumo: Atualmente, as mudanças climáticas e a questão energética tem sido tema de grande interesse e discussões mundiais. Assim, um número crescente de novas tecnologias verdes tem sido propostas para transformar o modo como a energia é produzida, distribuída e consumida. Neste contexto, as células a combustível surg

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Gentil, Tuani Carla. "Estudo da adição de nanobarras de CeO2 em eletrocatalisadores híbridos à base de PtSn para oxidação eletroquímica de etanol em meio ácido." reponame:Repositório Institucional da UFABC, 2018.

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Orientador: Prof. Dr. Mauro Coelho dos Santos<br>Dissertação (mestrado) - Universidade Federal do ABC. Programa de Pós-Graduação em Ciência e Tecnologia/Química, 2018.<br>Eletrocatalisadores Pt/C e PtSn/C (20% em massa de metal no suporte) foram sintetizados pelo método de Redução Química por Borohidreto de Sódio, sendo adicionadas nanobarras (nanorods-NR) de CeO2 aos materiais binários, nas porcentagens de 5, 10 e 20% da carga metálica, para a formação do material híbrido. As razões mássicas obtidas por meio dos experimentos de MEV-EDS para Pt3Sn1/C (75:25), Pt2Sn1/C (67:33), Pt1Sn1/C (50:50)

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Matter, Paul H. "Electrocatalytic and fuel processing studies for portable fuel cells." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1149037376.

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Lampitt, Rosemary Anne. "Structural investigations of fuel cell electrocatalysts." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265212.

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Rose, Abigail. "Structural effects in fuel cell electrocatalysts." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402424.

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