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À propos de : Stationary Spatial Patterns during Bulk CO Electrooxidation on Platinum        

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  • Stationary Spatial Patterns during Bulk CO Electrooxidation on Platinum
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  • We present experimental studies and mathematical modeling on pattern formation during bulk COelectrooxidation on Pt ring electrodes. Profiles of the interfacial potential drop in front of the working electrodewere recorded with a potential probe. Stationary self-organized potential patterns were observed underpotentiostatic conditions in dilute acidic and basic supporting electrolytes. The amplitude and shape of thesepotential patterns can be modified by an appropriate local perturbation of the interfacial potential drop. Amathematical model of the formation of these patterns reveals that the homogeneous state becomes unstablethrough a subcritical Turing-like bifurcation and that several patterned electrode states coexist in wide parameterranges.
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