Oxidation of CO on Li-precovered Pt

被引：29

作者：

Yakovkin, IN ^{[1
]}

Chernyi, VI ^{[1
]}

Naumovets, AG ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Inst Phys, UA-252650 Kiev 22, Ukraine

来源：

SURFACE SCIENCE | 1999年 / 442卷 / 01期

关键词：

alkali metals; carbon monoxide; computer simulations; mass spectrometry; oxidation; oxygen; platinum; polycrystalline surfaces; surface chemical reaction;

D O I：

10.1016/S0039-6028(99)00895-X

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 effect of Li preadsorption on the kinetics of CO oxidation on a highly (111) textured polycrystalline Pt surface has been investigated using mass spectrometry to analyse the components of the reaction. Li preadsorption decreases the reaction rate and with a full Li monolayer the oxidation is completely damped. A Monte Carlo simulation of the reaction on an alkali-precovered Pt(111) surface clarifies the role of the dipole moments of alkali adatoms and related rates of increase of the sticking coefficient for oxygen adsorption in the efficiency of the promoters. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：81 / 89

页数：9

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