In situ and model EXAFS studies of electrocatalysts for methanol oxidation

被引：35

作者：

Lampitt, RA ^{[1
]}

Carrette, LPL ^{[1
]}

Hogarth, MP ^{[1
]}

Russell, AE ^{[1
]}

机构：

[1] Univ Newcastle Upon Tyne, Dept Chem, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1999年 / 460卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

electrocatalysts; methanol fuel cell; extended x-ray absorption fine structure;

D O I：

10.1016/S0022-0728(98)00349-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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)(4)(6-) 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 Angstrom. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：80 / 87

页数：8

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