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

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

doi:10.1063/1.1796235

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

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

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

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Abstract

The mechanism of carbon monoxide oxidation on oxygen covered Pt(111) surfaces during CO exposure was studied using time-resolved near edge x-ray absorption fine structure spectroscopy. A switching of reaction path in CO oxidation reaction was caused by the CO adsorption induced two dimensional condensation of O atoms. Monte Carlo simulations and in situ monitoring of reaction kinetics revealed that CO coadsorption played a role of inducing change in spatial distribution of O atoms. The results demonstrate that effects of long-range interactions and consequent dynamic spatial-distribution changes of the reactants are of importance for understanding the kinetics in the reaction systems deviated from the conventional Langmuir-Hinshelwood kinetics.

Original language	English
Pages (from-to)	5035-5038
Number of pages	4
Journal	Journal of Chemical Physics
Volume	121
Issue number	11
DOIs	https://doi.org/10.1063/1.1796235
Publication status	Published - 2004 Sept 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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abstract = "The mechanism of carbon monoxide oxidation on oxygen covered Pt(111) surfaces during CO exposure was studied using time-resolved near edge x-ray absorption fine structure spectroscopy. A switching of reaction path in CO oxidation reaction was caused by the CO adsorption induced two dimensional condensation of O atoms. Monte Carlo simulations and in situ monitoring of reaction kinetics revealed that CO coadsorption played a role of inducing change in spatial distribution of O atoms. The results demonstrate that effects of long-range interactions and consequent dynamic spatial-distribution changes of the reactants are of importance for understanding the kinetics in the reaction systems deviated from the conventional Langmuir-Hinshelwood kinetics.",

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AU - Nakai, I.

AU - Kondoh, H.

AU - Amemiya, K.

AU - Nagasaka, M.

AU - Nambu, A.

AU - Shimada, T.

AU - Ohta, T.

PY - 2004/9/15

Y1 - 2004/9/15

N2 - The mechanism of carbon monoxide oxidation on oxygen covered Pt(111) surfaces during CO exposure was studied using time-resolved near edge x-ray absorption fine structure spectroscopy. A switching of reaction path in CO oxidation reaction was caused by the CO adsorption induced two dimensional condensation of O atoms. Monte Carlo simulations and in situ monitoring of reaction kinetics revealed that CO coadsorption played a role of inducing change in spatial distribution of O atoms. The results demonstrate that effects of long-range interactions and consequent dynamic spatial-distribution changes of the reactants are of importance for understanding the kinetics in the reaction systems deviated from the conventional Langmuir-Hinshelwood kinetics.

AB - The mechanism of carbon monoxide oxidation on oxygen covered Pt(111) surfaces during CO exposure was studied using time-resolved near edge x-ray absorption fine structure spectroscopy. A switching of reaction path in CO oxidation reaction was caused by the CO adsorption induced two dimensional condensation of O atoms. Monte Carlo simulations and in situ monitoring of reaction kinetics revealed that CO coadsorption played a role of inducing change in spatial distribution of O atoms. The results demonstrate that effects of long-range interactions and consequent dynamic spatial-distribution changes of the reactants are of importance for understanding the kinetics in the reaction systems deviated from the conventional Langmuir-Hinshelwood kinetics.

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

Abstract

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