Carbon-supported Pt-Co catalysts prepared by a modifled polyol process as cathodes for PEM fuel cells
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
22/02/2007
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Resumo |
In this work, carbon-supported Pt70Co30 nanoparticles were prepared by a polyol process using a long-chain diol as reducer (hexadecanediol) and oleic acid and oleylamine as stabilizers. Depending on the synthesis conditions, Pt70Co30/C nanocatalysts with very small particle size (1.9 +/- 0.2 nm) and narrow distribution homogeneously dispersed on the carbon support and having a high degree of alloying without the need of thermal treatments were obtained. The as-prepared catalyst presents an excellent performance as proton exchange membrane fuel cells (PEMFC) cathode material. In terms of mass activity (MA), the Pt70Co30/C electrocatalysts produced single fuel cell polarization response superior to that of commercial catalyst. To analyze alloying effects, the result of thermal treatment at low temperatures (200-400 degrees C) was also evaluated and an increase of average crystallite size and a lower degree of alloying, probably associated to cobalt oxidation, were evidenced. |
Formato |
3146-3151 |
Identificador |
http://dx.doi.org/10.1021/jp0670081 Journal of Physical Chemistry C. Washington: Amer Chemical Soc, v. 111, n. 7, p. 3146-3151, 2007. 1932-7447 http://hdl.handle.net/11449/25419 10.1021/jp0670081 WOS:000245005800043 |
Idioma(s) |
eng |
Publicador |
Amer Chemical Soc |
Relação |
Journal of Physical Chemistry C |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |