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

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

Research output: Contribution to journalArticle

33 Citations (Scopus)

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 languageEnglish
Pages (from-to)5035-5038
Number of pages4
JournalJournal of Chemical Physics
Volume121
Issue number11
DOIs
Publication statusPublished - 2004 Sep 15
Externally publishedYes

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Carbon Monoxide
Spatial distribution
spatial distribution
Oxidation
oxidation
kinetics
x ray absorption
carbon monoxide
atoms
reaction kinetics
condensation
Atoms
fine structure
Kinetics
adsorption
Reaction kinetics
oxygen
Condensation
spectroscopy
Spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Reaction-path switching induced by spatial-distribution change of reactants : CO oxidation on Pt(111). / Nakai, I.; Kondoh, Hiroshi; Amemiya, K.; Nagasaka, M.; Nambu, A.; Shimada, T.; Ohta, T.

In: Journal of Chemical Physics, Vol. 121, No. 11, 15.09.2004, p. 5035-5038.

Research output: Contribution to journalArticle

Nakai, I. ; Kondoh, Hiroshi ; Amemiya, K. ; Nagasaka, M. ; Nambu, A. ; Shimada, T. ; Ohta, T. / Reaction-path switching induced by spatial-distribution change of reactants : CO oxidation on Pt(111). In: Journal of Chemical Physics. 2004 ; Vol. 121, No. 11. pp. 5035-5038.
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