Bistable mean-field kinetics of CO oxidation on Pt with oxide formation
Journal article, 2005

The bistability of the kinetics of CO oxidation on Pt at sub-atmospheric pressures can be complicated by surface-oxide formation. We present a simple mean-field model making it possible to describe a transition from the low reactive reaction regime occurring via the conventional mechanism of CO oxidation at CO excess, to the high reactive regime including CO interaction with a fully developed surface-oxide overlayer at O2 excess. In the latter case, the oxide is assumed to form islands, the CO2 formation may run primarily on oxide, and in agreement with recent experiments the reaction rate may be several orders of magnitude lower than the CO adsorption rate on a bare metal surface.

Author

Per-Anders Carlsson

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Vladimir Zhdanov

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics, Chemical Physics

Bengt Herbert Kasemo

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics, Chemical Physics

Applied Surface Science

Vol. 239 424-31

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Created

10/6/2017