The effects of hydrogen sulfide on the polymer electrolyte membrane fuel cell anode catalyst: H(2)S-Pt/C interaction products


Autoria(s): LOPES, Thiago; PAGANIN, Valdecir A.; GONZALEZ, Ernesto R.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2011

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

http://dx.doi.org/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