Oxidation of CO on Li-precovered Pt

Authors
Yakovkin, IN Chernyi, VI Naumovets, AG
Citation
In. Yakovkin et al., Oxidation of CO on Li-precovered Pt, SURF SCI, 442(1), 1999, pp. 81-89
Citations number
34
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
442
Issue
1
Year of publication
1999
Pages
81 - 89
Database
ISI
SICI code
0039-6028(19991110)442:1<81:OOCOLP>2.0.ZU;2-B
Abstract
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 de creases the reaction rate and with a full Li monolayer the oxidation is com pletely damped. A Monte Carlo simulation of the reaction on an alkali-preco vered Pt(111) surface clarifies the role of the dipole moments of alkali ad atoms 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.