CHEMISORPTION OF CO ON CU(100), AG(110) AND AU(110)

被引：51

作者：

SANDELL, A ^{[1
]}

BENNICH, P ^{[1
]}

NILSSON, A ^{[1
]}

HERNNAS, B ^{[1
]}

BJORNEHOLM, O ^{[1
]}

MARTENSSON, N ^{[1
]}

机构：

[1] UNIV UPPSALA,DEPT PHYS,BOX 530,S-75121 UPPSALA,SWEDEN

来源：

SURFACE SCIENCE | 1994年 / 310卷 / 1-3期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1016/0039-6028(94)91366-8

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 adsorption of CO on Cu, Ag and Au is studied using core and valence photoemission, X-ray absorption and autoionization of core excited states. The purpose is to investigate the nature of the adsorption bond starting out from the well-established chemisorption system CO/Cu(100)-c(2 x 2), and from the results we suggest that CO forms chemisorbed phases also on Ag(110) and Au(110). The photoemission spectra show strong shake-up satellites both for the valence levels and the core levels. The separation to the satellite appearing closest to the main line is observed to follow the position of the substrate d-band relative to the Fermi level. The CO adsorption strength for the noble metals is deduced to decrease in the order Cu-Au-Ag. This is based on the widths of the XA resonances, which are related to the adsorbate-substrate interaction strength of the core excited states, and the relative shake-up intensities, which are expected to increase with a decreasing adsorption strength in the ground state. The same trends regarding the shake-up intensities are observed both for the valence and core levels.

引用

页码：16 / 26

页数：11

共 33 条

[1] ABINITIO HARTREE-FOCK CALCULATIONS OF MOLECULAR X-RAY-INTENSITIES - VALIDITY OF ONE-CENTER APPROXIMATIONS [J].