Polymer Electrolyte Membrane Fuel Cells
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Low and medium temperature fuel cells: experimental tests and economic assessment / Low and medium temperature fuel cells: experimental tests and economic assessment
This Masters dissertation aims to study technical potentialities of Fuel Cell technology, including the economical benefits that can provide compared with public grid as well. Thus, the dissertation has been focused in two main parts: the first concerns in an experimental approach to supply electrical power to the public grid using a Polymer Electrolyte Memb
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/12/2012
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2. Platinum and nioubium based catalysts for the anode of polymer electrolyte membrane fuel cells fed with low molecular weight alcohols / 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
In this work, the methanol and ethanol electrochemical oxidation reactions are studied on platinum (Pt) and niobium (Nb) catalysts supported on high surface area carbon. The selected materials were PtNb/C, Pt-Nb2O5(amorphous) /C e Pt-Nb2O5(crystalline) /C, using as reference for comparison purposes the commercial catalyst 20% Pt-C E-TEK. The catalysts were p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/01/2012
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3. Estudo dos efeitos de contaminadores sobre o desempenho das células a combustível de membrana de eletrólito polimérico / Diagnosing the effects contaminants have over polymer electrolyte membrane fuel cells
Os componentes do conjunto membrana/eletrodos (MEA) das células a combustível de membrana de eletrólito polimérico/Polymer Electrolyte Membrane Fuel Cells (PEMFC) são sensíveis a impurezas, as quais podem vir do ar, do gás combustível e/ou da degradação dos componentes do módulo. Amônia, sulfeto de hidrogênio e monóxido de carbono são juntos o
Publicado em: 2010
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4. Síntese e caracterizção eletroquímica de membranas híbridas Nafion-SIO2 para a aplicação como eletrólito polimérico em células a combustível tipo PEM / Synthesis and electrochemical characterization of hybrid membrane nafion-SiO2 for application as polymer electrolyte in PEM fuel cell
In this work, the effect of sol-gel synthesis parameters on the preparation and polarization response of Nafion-SiO2 hybrids as electrolytes for proton exchange membrane fuel cells (PEMFC) operating at high temperatures (130 oC) was evaluated. The inorganic phase was incorporated in a Nafion matrix with the following purposes: to improve the Nafion water upt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2009
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5. Estudo do desempenho e degradação de catalisadores e membranas em células a combustível de eletrólito polimérico / A performance and degradation study of catalysts and membranes for proton exchange fuel cell
In this work, the oxygen reduction reaction (ORR) was studied on nano-particulated Pt and PtM (M = Co, Cr, Fe e Ni) alloy electrocatalysts supported on carbon, prepared by an impregnation method, for utilization on polymer electrolyte fuel cell (PEFC). The physical properties of the materials have been investigated by energy dispersive X-ray analyses (EDX),
Publicado em: 2009
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6. Microscopia de força atômica in-situ de superfícies de membranas poliméricas de Nafion com nanopartículas de sílica incorporadas / Atomic force microscopy in-situ of polymeric Nafion membrane surfaces with nanoparticles of incorporated silica
Fountains of renewable energies are occupying an important space in scientific inquiries. Within this Proton Exchange Membrane Fuel Cells (PEMFC) stand out. Studies show that the elevation of PEMFCs operation temperature results in the increase of its efficiency. Nevertheless, in these work conditions there appears to be a necessity in improving electrolyte
Publicado em: 2008