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In situ and model EXAFS studies of electrocatalysts for methanol oxidation

Lookup NU author(s): Dr Rosy Lampitt

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Abstract

The structure of carbon supported platinum electrocatalysts for the direct methanol fuel cell has been studied using extended X-ray absorption fine structure (EXAFS) in both gas treatment and electrochemical environments. The EXAFS of the as prepared catalyst indicates that the preparation of the dispersed Pt by the oxidation of Pt(SO3)6-4 forms dispersed PtOx species. After reduction by either flowing hydrogen in the gas treatment cell or potentiostatically in the electrochemical cell small Pt particles are formed as indicated by the presence of Pt neighbours in the first coordination shell. Carbon neighbours from the support are also evident in the first coordination shell, at 2.6 and 3.6 Å.


Publication metadata

Author(s): Lampitt RA, Carrette LPL, Hogarth MP, Russell AE

Publication type: Article

Publication status: Published

Journal: Journal of Electroanalytical Chemistry

Year: 1999

Volume: 460

Issue: 1-2

Pages: 80-87

Print publication date: 18/01/1999

ISSN (print): 1572-6657

ISSN (electronic): 1873-2569

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/S0022-0728(98)00349-0

DOI: 10.1016/S0022-0728(98)00349-0


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