SHEDDING LIGHT ON CATALYTIC IGNITION - COVERAGE CHANGES DURING CO OXIDATION ON PD(110)

Authors
BOWKER M JONES IZ BENNETT RA ESCH F BARALDI A LIZZIT S COMELLI G
Citation
M. Bowker et al., SHEDDING LIGHT ON CATALYTIC IGNITION - COVERAGE CHANGES DURING CO OXIDATION ON PD(110), Catalysis letters, 51(3-4), 1998, pp. 187-190
Citations number
15
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
51
Issue
3-4
Year of publication
1998
Pages
187 - 190
Database
ISI
SICI code
1011-372X(1998)51:3-4<187:SLOCI->2.0.ZU;2-M
Abstract
Catalytic ignition or 'light-off' has been studied for a reaction of i mportance in automobile exhaust emissions, namely, CO oxidation over P d, a metal which has become an important component of car catalysts. W e present kinetic and spectroscopic studies to show that light-off is associated with a step change in surface composition of reactant as th e surface is heated. Fast XPS using synchrotron radiation of high brig htness reveals that the surface is dominated by CO at low temperature and the coverage suddenly switches during light-off to an oxygen-atom- dominated situation.