The effects of hydrogen sulfide on the polymer electrolyte membrane fuel cell anode catalyst: H(2)S-Pt/C interaction products
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2011
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Resumo |
The performance of a polymer electrolyte membrane fuel cell (PEMFC) operating on a simulated hydrocarbon reformate is described. The anode feed stream consisted of 80% H(2),similar to 20% N(2), and 8 ppm hydrogen sulfide (H(2)S). Cell performance losses are calculated by evaluating cell potential reduction due to H(2)S contamination through lifetime tests. It is found that potential, or power, loss under this condition is a result of platinum surface contamination with elemental sulfur. Electrochemical mass spectroscopy (EMS) and electrochemical techniques are employed, in order to show that elemental sulfur is adsorbed onto platinum, and that sulfur dioxide is one of the oxidation products. Moreover, it is demonstrated that a possible approach for mitigating H(2)S poisoning on the PEMFC anode catalyst is to inject low levels of air into the H(2)S-contaminated anode feeding stream. (C) 2011 Elsevier B.V. All rights reserved. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Thiago Lopes`s PhD scholarship Thiago Lopes`s PhD scholarship[142097/2005-5] Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Brazil Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) |
Identificador |
JOURNAL OF POWER SOURCES, v.196, n.15, p.6256-6263, 2011 0378-7753 http://producao.usp.br/handle/BDPI/31661 10.1016/j.jpowsour.2011.04.017 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV |
Relação |
Journal of Power Sources |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #PEMFCs #Durability #H(2)S #Mass spectrometry #Hydrogen sulfide/platinum interaction products #ELECTROCHEMICAL OXIDATION #PLATINUM #SULFUR #PERFORMANCE #ADSORPTION #PEMFC #SPECTROSCOPY #REACTIVATION #Electrochemistry #Energy & Fuels |
Tipo |
article original article publishedVersion |