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- W2471689976 abstract "Ethylene hydrogenation was investigated on size-selected Pt13 clusters supported on three amorphous silica (a-SiO2 ) thin films with different stoichiometries. Activity measurements of the reaction at 300 K revealed that on a silicon-rich and a stoichiometric film, Pt13 exhibits a similar activity to that of Pt(111), in line with the known structure insensitivity of the reaction. On an oxygen-rich film, a threefold increased rate was measured. Pulsing ethylene at 400 K, then measuring the activity at 300 K, resulted in complete loss of activity on the silicon-rich surface compared to only marginal losses on the other surfaces. The measured reactivity trends correlate with charging characteristics of a Pt13 cluster on the SiO2 films, predicted through first-principle calculations. The results reveal that the stoichiometry-dependent charging by the support can be used to tune the selectivity of reaction pathways during a catalytic hydrogenation reaction." @default.
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- W2471689976 date "2016-06-29" @default.
- W2471689976 modified "2023-10-03" @default.
- W2471689976 title "Controlling Ethylene Hydrogenation Reactivity on Pt13Clusters by Varying the Stoichiometry of the Amorphous Silica Support" @default.
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- W2471689976 doi "https://doi.org/10.1002/anie.201603332" @default.
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