Abstract
Chemical wave patterns in catalytic CO oxidation on a Pt(1 1 0) surface have been studied in the 10 −5 mbar range using low energy electron microscopy (LEEM) as spatially resolving method. During rate oscillations a cellular pattern develops whose characteristic dimensions are apparently determined by the surface topography of the Pt(1 1 0) surface. Exposure to oscillatory conditions causes a roughening of the surface associated with macroscopic changes in the surface topography.
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