NEXAFS study of CO adsorption on ZnO(000(1)over-bar1)-O and ZnO (000(1)over-bar)-O/Cu

被引：28

作者：

Lindsay, R

Gutiérrez-Sosa, A

Thornton, G ^{[1
]}

Ludviksson, A

Parker, S

Campbell, CT

机构：

[1] Univ Manchester, Interdisciplinary Res Ctr Surface Sci, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

[3] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

SURFACE SCIENCE | 1999年 / 439卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

carbon monoxide; chemisorption; copper; low index single crystal surfaces; metal-semiconductor interfaces; near edge extended X-ray absorption fine structure (NEXAFS); single crystal epitaxy; surface chemical reaction; surface structure; morphology; roughness; and topography; zinc oxide;

D O I：

10.1016/S0039-6028(99)00749-9

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：

C K-edge near edge X-ray absorption fine structure (NEXAFS) measurements have been used to investigate CO adsorption at 130 K on ZnO(000 (1) over bar)-O and on the same surface after a 2D submonolayer Cu film has been deposited. CO adsorption on clean ZnO(000 (1) over bar)-O gives rise to two pi* resonances in the NEXAFS spectra at 287.7 +/- 0.2 eV and 290.4 +/- 0.2 eV. These are assigned to molecular CO, which is metastable under our experimental conditions, and CO32-. Only one intense pi* resonance, at 287.7 +/- 0.2 eV, is observed for CO adsorption on ZnO(000 (1) over bar)-O after submonolayer Cu deposition. This is also attributed to adsorbed molecular CO. The polarisation dependence of this resonance indicates that the CO molecular axis is tilted by 17 +/- 10 degrees away from the surface normal. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：131 / 138

页数：8

共 24 条

[1] ADSORPTION OF CARBON-MONOXIDE AND CARBON-DIOXIDE ON ANNEALED AND DEFECT ZINC-OXIDE (0001) SURFACES STUDIED BY PHOTOELECTRON-SPECTROSCOPY (XPS AND UPS) [J].