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- W2034367834 abstract "Single-crystal Pt(111) surfaces with a spatially varying step concentration have been prepared. Using Auger spectroscopy the steady-state oxygen coverage and its transient behavior were determined as a function of the O2 and CO partial pressures. The steady-state coverage was found to depend on the ratio of the partial pressures only. The sticking probability of O2 and the reaction probability for CO are determined as a function of coverage and step concentration. It was found that the reaction probability is reduced on stepped surfaces. The sticking probability increases exponentially with increasing step concentration and decreases with oxygen coverage. In a model assuming activated adsorption the exponential dependence is linked to the changes in the surface potential due to the presence of steps and adsorbed oxygen atoms. The results show that structural imperfections may have a positive or a negative effect on the CO-oxidation rate depending on the reaction conditions." @default.
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- W2034367834 date "1977-01-01" @default.
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- W2034367834 title "Catalytic oxidation of carbon monoxide on stepped platinum(111) surfaces" @default.
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- W2034367834 doi "https://doi.org/10.1016/0021-9517(77)90133-6" @default.
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