COVERAGE DEPENDENCE OF STICKING COEFFICIENT OF O-2 ON AG(110)

被引：35

作者：

VATTUONE, L ^{[1
]}

ROCCA, M ^{[1
]}

BORAGNO, C ^{[1
]}

VALBUSA, U ^{[1
]}

机构：

[1] INFM,DIPARTIMENTO FIS,I-16146 GENOA,ITALY

来源：

JOURNAL OF CHEMICAL PHYSICS | 1994年 / 101卷 / 01期

关键词：

D O I：

10.1063/1.468128

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 on the dependence of the sticking coefficient S of O-2 on Ag(110) on oxygen coverage, for molecular and dissociative adsorption. S is found to diminish strongly with increasing coverage. The initial dependence is linear and for dissociative adsorption the slope depends on crystal temperature. The data are indicative of a coverage dependence of the adsorption barrier height, which is caused by the change of the surface work function with coverage. The analysis of the temperature variation of the dependence of S on coverage allows to extract the variation of the ratio of the pre-exponential factors and of the height of the barriers for desorption and dissociation from the molecularly chemisorbed state.

引用

页码：726 / 730

页数：5

共 19 条

[1] THE ADSORPTION OF MOLECULAR-OXYGEN SPECIES ON AG(110) [J].