Evidence for a surface reaction between H and CO adsorbed on polycrystalline Pt
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Temperature programmed desorption (TPD) experiments have been performed after dosing an ion-sputtered and annealed polycrystalline Pt surface with CO and H2. The CO-dosing was done both sequentially and simultaneously. With increasing residence time on the surface, the H2-TPD spectra exhibit conversion of the original H2-like features to features similar to the CO-TPD peaks. This provides evidence for the formation of a CO/H surface species through a chemical reaction between adsorbed H and adsorbed CO. The reaction occurs more rapidly when the sample is dosed or held at elevated temperatures, indicating that the reaction is activated.
KeywordsPhysical Chemistry Catalysis Elevated Temperature Surface Reaction Temperature Program Desorption
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