Mechanism of the CO oxidation reaction on O-precovered Pt(111) surfaces studied with near-edge x-ray absorption fine structure spectroscopy

I. Nakai; H. Kondoh; K. Amemiya; M. Nagasaka; T. Shimada; R. Yokota; A. Nambu; T. Ohta

doi:10.1063/1.1869415

Mechanism of the CO oxidation reaction on O-precovered Pt(111) surfaces studied with near-edge x-ray absorption fine structure spectroscopy

I. Nakai, H. Kondoh, K. Amemiya, M. Nagasaka, T. Shimada, R. Yokota, A. Nambu, T. Ohta

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24 Citations (Scopus)

Abstract

The mechanism of CO oxidation reaction on oxygen-precovered Pt(111) surfaces has been studied by using time-resolved near-edge x-ray absorption fine structure spectroscopy. The whole reaction process is composed of two distinct paths: (1) a reaction of isolated oxygen atoms with adsorbed CO, and (2) a reaction of island-periphery oxygen atoms after the CO saturation. CO coadsorption plays a role to induce the dynamic change in spatial distribution of O atoms, which switches over the two reaction paths. These mechanisms were confirmed by kinetic Monte Carlo simulations. The effect of coadsorbed water in the reaction mechanism was also examined.

Original language	English
Article number	134709
Journal	Journal of Chemical Physics
Volume	122
Issue number	13
DOIs	https://doi.org/10.1063/1.1869415
Publication status	Published - 2005 Sep 13
Externally published	Yes

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ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Cite this

Nakai, I., Kondoh, H., Amemiya, K., Nagasaka, M., Shimada, T., Yokota, R., Nambu, A., & Ohta, T. (2005). Mechanism of the CO oxidation reaction on O-precovered Pt(111) surfaces studied with near-edge x-ray absorption fine structure spectroscopy. Journal of Chemical Physics, 122(13), [134709]. https://doi.org/10.1063/1.1869415

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AU - Nagasaka, M.

AU - Shimada, T.

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AU - Nambu, A.

AU - Ohta, T.

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10.1063/1.1869415