The effect of a water overlayer on the chlorine-chemisorbed Ag(100) surface studied by Cl K-edge X-ray absorption fine structure

被引：17

作者：

Endo, O ^{[1
]}

Kondoh, H ^{[1
]}

Yonamoto, Y ^{[1
]}

Yokoyama, T ^{[1
]}

Ohta, T ^{[1
]}

机构：

[1] Univ Tokyo, Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan

来源：

SURFACE SCIENCE | 2000年 / 463卷 / 02期

关键词：

chemisorption; chlorine; extended X-ray absorption fine structure (EXAFS); low index single crystal surfaces; silver; surface chemical reaction; water;

D O I：

10.1016/S0039-6028(00)00640-3

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：

The effect of a water overlayer on the chlorine-chemisorbed silver(100) surface has been studied by Cl K-edge X-ray absorption fine structure spectroscopy. It is found that chlorine atoms adsorbed on Ag(100) form a simple c(2 x 2) overlayer with a Cl-Ag bond distance of 2.64 +/- 0.03 Angstrom and Cl-Cl distance of 4.06 +/- 0.05 Angstrom. By dosing water on the chemisorbed surface, the Cl-Ag bond is elongated to 2.70 +/- 0.03 Angstrom and theCl-Cl bond is shortened to 3.90 +/- 0.05 Angstrom. Such a structural change is explained by the partial formation of silver chloride on the surface. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：135 / 144

页数：10

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