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

页码：19 / 24

页数：6

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