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...
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Published in | The Journal of chemical physics Vol. 121; no. 11; p. 5035 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
15.09.2004
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Online Access | Get more information |
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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. |
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ISSN: | 0021-9606 |
DOI: | 10.1063/1.1796235 |