EXAFS STUDIES OF ADSORBED COPPER ON CARBON-SUPPORTED PLATINUM

被引：14

作者：

MCBREEN, J

机构：

[1] Department of Applied Science, Brookhaven National Laboratory, Upton

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1993年 / 357卷 / 1-2期

关键词：

D O I：

10.1016/0022-0728(93)80392-U

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In situ extended X-ray absorption fine structure (EXAFS) studies were done on adsorbed copper on carbon-supported platinum in 0.5 M H2SO4 + 2 x 10(-3) M Cu++ at 0.05 V SCE. Data analysis of the nearest coordination shells around the copper is consistent with Cu adsorption on Pt on the on-top position with a Cu-Pt bond length of 2.67 angstrom. The results indicate that copper is also coordinated with three oxygens at a distance of 2.06 angstrom and one sulfur at a distance of 2.37 angstrom. This indicates co-adsorption of bisulfate ions. The bisulfate is probably adsorbed on top of the copper where it facilitates charge transfer from the copper to the platinum and yields the adsorbed Cu+ species that have been observed in X-ray absorption near-edge spectroscopy studies.

引用

页码：373 / 386

页数：14

共 23 条

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