Lateral interaction of CO chemisorbed on Ru(0001)

被引：47

作者：

He, P ^{[1
]}

Dietrich, H ^{[1
]}

Jacobi, K ^{[1
]}

机构：

[1] MAX PLANCK GESELL,FRITZ HABER INST,D-14195 BERLIN,GERMANY

来源：

SURFACE SCIENCE | 1996年 / 345卷 / 03期

关键词：

CO adsorption; dipole coupling; Ru-CO stretch mode;

D O I：

10.1016/0039-6028(95)00885-3

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：

We report a high-resolution electron energy spectroscopy (HREELS) study of the coverage dependence of the Ru-CO and C-O stretch modes of chemisorbed CO on Ru(0001) at 300 K. For CO coverages theta(CO) larger than 0.33 we observe remarkable frequency changes. Up to theta(CO)=0.33 both frequencies increase due to lateral dipole coupling. For theta(CO)>0.33, i.e. in the compression phase, nu(C-O) increases even stronger whereas nu(Ru-CO) decreases. The decrease of nu(Ru-CO) gives direct evidence of the weakening of the bond between CO and the surface which correlates with the known thermal desorption and structural data.

引用

页码：241 / 246

页数：6

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