OXIDE FORMATION AND REACTIVITY FOR METHANOL OXIDATION ON PLATINIZED CARBON ANODES

被引：59
作者：
KENNEDY, BJ [1 ]
HAMNETT, A [1 ]
机构：
[1] UNIV OXFORD,OXFORD OX1 3QR,ENGLAND
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 283卷 / 1-2期
关键词：
D O I：
10.1016/0022-0728(90)87395-Z
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An XPS study of Pt and Pt + Ru PTFE bonded carbon electrodes for methanol oxidation in acid solutions is reported. The role of Pt oxides in deactivating the Pt:C electrodes is discussed. For Pt + Ru: C electrodes, evidence that Ru acts by promoting the formation of Pt-OH groups is presented and possible mechanisms are discussed. The effect of periodic potential relaxation steps on the life performance of the electrodes is presented. The differences in behaviour can be partially explained by considering at least two types of Pt oxides to form, one a tightly bonded inactive group and the second a more labile moiety. Surprisingly, formation of inactive oxides groups on Pt: C electrodes appears to be favoured by the presence of methanol. © 1990.
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页码：271 / 285
页数：15
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