In situ and real time study of an electrode process by differential X-ray diffraction .1. Ag underpotential deposition on Au(111)

被引:17
作者
Chabala, ED [1 ]
Ramadan, AR [1 ]
Brunt, T [1 ]
Rayment, T [1 ]
机构
[1] UNIV CAMBRIDGE,CHEM LAB,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND
来源
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1996年 / 412卷 / 1-2期
基金
英国工程与自然科学研究理事会;
关键词
X-ray diffraction; electrochemical interface; underpotential deposition; Ag; in situ study; real time study;
D O I
10.1016/0022-0728(96)04597-4
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The underpotential deposition of Ag on Au(111) was used to demonstrate the adsorption of monolayers at the electrode\electrolyte interface and their measurement with X-ray diffraction in situ and in real time. The information obtained is that of the adlayer spacing during the monolayer formation with respect to the interplanar spacing in the bulk of the substrate. Although it was not straightforward to assign the spacings of the Ag adlayer to adsorption sites on the Au(111) electrode, it was possible to observe phase transitions in the adlayer during underpotential deposition. Detailed theory of the differential X-ray diffraction phenomenon and data analysis is given. A conventional laboratory source of X-rays was used.
引用
收藏
页码:67 / 75
页数:9
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