PT-RU ANODES FOR METHANOL ELECTROOXIDATION - A RU-99 MOSSBAUER STUDY

被引：40
|
作者：
HAMNETT, A [1 ]
KENNEDY, BJ [1 ]
WAGNER, FE [1 ]
机构：
[1] TECH UNIV MUNICH,DEPT PHYS E15,W-8046 GARCHING,GERMANY
来源：
JOURNAL OF CATALYSIS | 1990年 / 124卷 / 01期
关键词：
D O I：
10.1016/0021-9517(90)90101-O
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
99Ru Mössbauer spectra have been obtained for a series of PtRu methanol oxidation anodes. For the most catalytically active sample, XPS and Mössbauer data indicate the presence of Ru(IV) species with a small quadrupole splitting. For highly dispersed samples the Mössbauer data indicate that the Ru is present as a mixture of rutile-phase RuO2 and a second Ru(IV) species. Comparison with electrocatalytic results suggests that the second Ru(IV) species is the active catalytic copromoter. The possible identity of this species is discussed. © 1990.
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页码：30 / 40
页数：11
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