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- W3022764749 abstract "Atomically precise thiolate protected Au nanoclusters Au38(SC2H4Ph)24 on CeO2 were used for in-situ (operando) extended X-ray absorption fine structure/diffuse reflectance infrared fourier transform spectroscopy and ex situ scanning transmission electron microscopy–high-angle annular dark-field imaging/X-ray photoelectron spectroscopy studies monitoring cluster structure changes induced by activation (ligand removal) and CO oxidation. Oxidative pretreatment at 150 °C “collapsed” the clusters’ ligand shell, oxidizing the hydrocarbon backbone, but the S remaining on Au acted as poison. Oxidation at 250 °C produced bare Au surfaces by removing S which migrated to the support (forming Au+-S), leading to highest activity. During reaction, structural changes occurred via CO-induced Au and O-induced S migration to the support. The results reveal the dynamics of nanocluster catalysts and the underlying cluster chemistry." @default.
- W3022764749 created "2020-05-13" @default.
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- W3022764749 date "2020-05-08" @default.
- W3022764749 modified "2023-10-10" @default.
- W3022764749 title "The Dynamic Structure of Au<sub>38</sub>(SR)<sub>24</sub> Nanoclusters Supported on CeO<sub>2</sub> upon Pretreatment and CO Oxidation" @default.
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- W3022764749 doi "https://doi.org/10.1021/acscatal.0c01621" @default.
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