HREELS AND ARUPS INVESTIGATION OF THE COADSORPTION OF CO AND K ON CU(111)

被引：11

作者：

BAO, S

XU, R

XU, CY

LI, HY

ZHU, L

XU, YB

机构：

[1] ACAD SINICA,SURFACE PHYS LAB,BEIJING 100080,PEOPLES R CHINA

[2] ACAD SINICA,SURFACE PHYS LAB,BEIJING 100080,PEOPLES R CHINA

来源：

SURFACE SCIENCE | 1992年 / 271卷 / 03期

关键词：

D O I：

10.1016/0039-6028(92)90912-P

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 CO + K/Cu(111) system at potassium precoverages below 0.18 has been investigated using HREELS and ARUPS. Two molecular adsorption states of CO were found at low temperature. One with lower C-O stretch frequency, named alpha-1, has a stronger interaction between the adsorbed CO molecule and coadsorbed K, while the other with higher C-O stretch frequency, named alpha-2, has a weaker interaction. The alpha-1 and alpha-2 states are occupied sequentially during the exposure to CO. At room temperature, only the alpha-1 state was found. The low 4-sigma/(5-sigma + 1-pi) intensity ratio suggests that the alpha-1-CO molecules do not stand upright.

引用

页码：513 / 518

页数：6

共 25 条

[1] VALENCE BAND PHOTOEMISSION FROM THE COADSORPTION SYSTEMS NI(100)/CO/K AND NI(100)/CO/S [J].