Oxygen distribution and site switching for CO2 formation on Pd(100), Pd(110) and Pt(113): An angular and velocity distribution study

Authors
Matsushima, T Wako, S Moula, MG Cao, GY Kobal, I Ohno, Y
Citation
T. Matsushima et al., Oxygen distribution and site switching for CO2 formation on Pd(100), Pd(110) and Pt(113): An angular and velocity distribution study, JPN J A P 1, 39(7B), 2000, pp. 4389-4394
Citations number
36
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS → ACNP
Volume
39
Issue
7B
Year of publication
2000
Pages
4389 - 4394
Database
ISI
SICI code
Abstract
The working site providing reactive oxygen was examined from the angular an d velocity distributions of the desorbing product, CO2, on Pd(100), Pd(110) , and Pt(113) by means of cross-correlation time-of-flight techniques. Arou nd a critical CO pressure where the rate-determining step of CO oxidation s hifted from CO adsorption to O-2 dissociation, site switching was confirmed for CO2 formation on Pt(113) and Pd(110). On the other hand, no site switc hing was found on Pd(100) although clear changes were observed in the chemi cal kinetics for CO2 formation.