Novel types of spatio-temporal patterns in catalytic CO oxidation on a facetted Pt(1 1 0) surface

Spatio-temporal patterns in catalytic CO oxidation have been studied on a facetted Pt(1 1 0) surface in the 10 −5 mbar range using low energy electron microscopy (LEEM). Prior to the LEEM experiments the surface had been facetted by exposing the sample to reaction conditions in the 10 −4 mbar range....

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Bibliographic Details
Published in:Chemical physics letters 2001-03, Vol.336 (3), p.181-186
Main Authors: Meißen, F., Patchett, A.J., Imbihl, R., Bradshaw, A.M.
Format: Article
Language:English
Subjects:
Catalysis
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Spatio-temporal patterns in catalytic CO oxidation have been studied on a facetted Pt(1 1 0) surface in the 10 −5 mbar range using low energy electron microscopy (LEEM). Prior to the LEEM experiments the surface had been facetted by exposing the sample to reaction conditions in the 10 −4 mbar range. Irregularly shaped spiral waves, interacting oxygen fronts, travelling CO islands with slowly decaying trails and travelling wave fragments exhibiting a superimposed slow rotation have been found. The experimental results are discussed in terms of reversible facetting changing the anisotropy of the surface and adding a slow time scale to the dynamics of the reaction.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(01)00124-5