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

Research output: Contribution to journal › Article › peer-review

25 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
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1063/1.1869415

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Mechanism of the CO oxidation reaction on O-precovered Pt(111) surfaces studied with near-edge x-ray absorption fine structure spectroscopy. / Nakai, I.; Kondoh, H.; Amemiya, K.; Nagasaka, M.; Shimada, T.; Yokota, R.; Nambu, A.; Ohta, T.

In: Journal of Chemical Physics, Vol. 122, No. 13, 134709, 2005.

Research output: Contribution to journal › Article › peer-review

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

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.",

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

note = "Funding Information: The authors are grateful for the financial support of Grant-in-Aids for scientific research (Grant No. 14204069) and the 21st century COE Program of the Ministry of Education, Culture, Sports, Science and Technology. The present work was performed under the approval of the Photon Factory Program Advisory Committee (PF PAC) (Grant No. 2001S2 003). One of the authors (I.N.) appreciates the JSPS Research Fellowship for Young Scientists.",

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AU - Nakai, I.

AU - Kondoh, H.

AU - Amemiya, K.

AU - Nagasaka, M.

AU - Shimada, T.

AU - Yokota, R.

AU - Nambu, A.

AU - Ohta, T.

N1 - Funding Information: The authors are grateful for the financial support of Grant-in-Aids for scientific research (Grant No. 14204069) and the 21st century COE Program of the Ministry of Education, Culture, Sports, Science and Technology. The present work was performed under the approval of the Photon Factory Program Advisory Committee (PF PAC) (Grant No. 2001S2 003). One of the authors (I.N.) appreciates the JSPS Research Fellowship for Young Scientists.

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

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

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