In-situ X-ray absorption studies of bromine on the Ag(100) electrode

被引：35
|
作者：
Endo, O
Kiguchi, M
Yokoyama, T
Ito, M
Ohta, T
机构：
[1] Univ Tokyo, Grad Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan
[2] Keio Univ, Fac Sci & Technol, Dept Chem, Kohoku Ku, Yokohama, Kanagawa 223, Japan
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1999年 / 473卷 / 1-2期
关键词：
X-ray absorption fine structure (XAFS); bromine; silver; adsorption;
D O I：
10.1016/S0022-0728(99)00148-5
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The structure of adsorbed bromine on the Ag(100) electrode has been studied with the in-situ XAFS (X-ray absorption fine structure) method. In the near edge XAFS (NEXAFS), the 1s-4p transition was clearly observed, which indicates that the electron transfer occurs from bromide anion to the silver substrate and the bond is partly covalent. The Br-Ag distance was determined to be 2.82 +/- 0.05 Angstrom, which is shorter than that of the bulk AgBr. The adsorption site was revealed to be a fourfold hollow site. These results suggest that the bromide ionicity is reduced in the adsorbate phase on the electrode. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：19 / 24
页数：6
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