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

Authors
Endo, O Kondoh, H Yonamoto, Y Yokoyama, T Ohta, T
Citation
O. Endo et al., The effect of a water overlayer on the chlorine-chemisorbed Ag(100) surface studied by Cl K-edge X-ray absorption fine structure, SURF SCI, 463(2), 2000, pp. 135-144
Citations number
56
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
463
Issue
2
Year of publication
2000
Pages
135 - 144
Database
ISI
SICI code
0039-6028(20000901)463:2<135:TEOAWO>2.0.ZU;2-Q
Abstract
The effect of a water overlayer on the chlorine-chemisorbed silver(100) sur face has been studied by Cl K-edge X-ray absorption fine structure spectros copy. 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 e xplained by the partial formation of silver chloride on the surface. (C) 20 00 Elsevier Science B.V. All rights reserved.