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Artigo Produção Nacional Revisado por pares
BIBTEX RIS

Impedance study of the oxidation of CO on polycrystalline platinum

2002; Elsevier BV; Volume: 532; Issue: 1-2 Linguagem: Inglês

10.1016/s0022-0728(02)00912-9

ISSN

1873-2569

Autores

Dayse C. de Azevedo, Alexei Lorenzetti Novaes Pinheiro, Roberto M. Torresi, Ernesto Rafael González,

Tópico(s)

Fuel Cells and Related Materials

Resumo

The electro-oxidation of CO on platinum is a reaction of fundamental interest in electrocatalysis and also in technological electrochemistry, because of its relation with fuel cells and gas sensors. In this work, electrochemical impedance spectroscopy was used to study the electro-oxidation of CO on a polycrystalline platinum rotating-disk electrode in perchloric acid solution. The results were interpreted in terms of a mechanism where the formation of oxygenated species on platinum is the limiting step.

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