Reaction-path switching induced by spatial-distribution change of reactants: CO oxidation on Pt(111)

We studied the mechanism of CO oxidation on O-covered Pt(111) surfaces during CO exposure by means of time-resolved near edge x-ray absorption fine structure spectroscopy. Two distinct reaction processes were found to occur sequentially; isolated O atoms and island-periphery O atoms contribute to ea...

Full description

Saved in:
Bibliographic Details
Published inThe Journal of chemical physics Vol. 121; no. 11; p. 5035
Main Authors Nakai, I, Kondoh, H, Amemiya, K, Nagasaka, M, Nambu, A, Shimada, T, Ohta, T
Format Journal Article
LanguageEnglish
Published United States 15.09.2004
Online AccessGet more information

Cover

More Information
Summary:We studied the mechanism of CO oxidation on O-covered Pt(111) surfaces during CO exposure by means of time-resolved near edge x-ray absorption fine structure spectroscopy. Two distinct reaction processes were found to occur sequentially; isolated O atoms and island-periphery O atoms contribute to each process. Combination of in situ monitoring of the reaction kinetics and Monte Carlo simulations revealed that CO coadsorption plays a role of inducing the dynamic change in spatial distribution of O atoms, which switches over the two reaction paths.
ISSN:0021-9606
DOI:10.1063/1.1796235