The Extent on the Nanoscale of Pt-Skin Effects on Oxygen Reduction and Its Influence on Fuel Cell Power
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
02/12/2010
|
Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Processo FAPESP: 07/54434-0 Carbon-supported PtFe nanoparticles having similar overall composition (3:1), crystallinity, and average particle diameter were prepared with and without a Pt-skin layer and used to evaluate the extent, on the nanometer scale, of Pt-skin effects on the activity for oxygen reduction. In this study, we show that when most of the relevant properties of the catalysts are kept alike, there is an increase of about 2-fold in the intrinsic activity for oxygen reduction that can be ascribed to Pt-skin effects. It is also demonstrated that the activity improvement produced by the presence of a Pt-skin surface is, however, insufficient to generate significant differences on the power density of a single proton exchange membrane fuel cell. |
Formato |
20267-20271 |
Identificador |
http://dx.doi.org/10.1021/jp107054u Journal of Physical Chemistry C. Washington: Amer Chemical Soc, v. 114, n. 47, p. 20267-20271, 2010. 1932-7447 http://hdl.handle.net/11449/25613 10.1021/jp107054u WOS:000284455200053 |
Idioma(s) |
eng |
Publicador |
Amer Chemical Soc |
Relação |
Journal of Physical Chemistry C |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |