Alumina-supported sub-nanometer Pt<sub>10</sub> clusters [electronic resource] : Amorphization and role of the support material in a highly active CO oxidation catalyst
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Additional Creators:
- Argonne National Laboratory
United States. Department of Energy. Office of Basic Energy Sciences
United States. Department of Energy. Office of Scientific and Technical Information
- Catalytic CO oxidation is unveiled on size-selected Pt<sub>10</sub> clusters deposited on two very different ultrathin (≈0.5–0.7 nm thick) alumina films: (i) a highly ordered alumina obtained under ultra-high vacuum (UHV) by oxidation of the NiAl(110) surface and (ii) amorphous alumina obtained by atomic layer deposition (ALD) on a silicon chip that is a close model of real-world supports. Notably, when exposed to realistic reaction conditions, the Pt<sub>10</sub>/UHV-alumina system undergoes a morphological transition in both the clusters and the substrate, and becomes closely akin to Pt<sub>10</sub>/ALD-alumina, thus reconciling UHV-type surface-science and real-world experiments. The Pt<sub>10</sub> clusters, thoroughly characterized <i>via</i> combined experimental techniques and theoretical analysis, exhibit among the highest CO oxidation activity per Pt atom reported for CO oxidation catalysts, due to the interplay of ultra-small size and support effects. Lastly, a coherent interdisciplinary picture then emerges for this catalytic system.
- Published through SciTech Connect.
Journal of Materials Chemistry. A 5 10 ISSN 2050-7488; JMCAET AM
Chunrong Yin; Fabio R. Negreiros; Giovanni Barcaro; Atsushi Beniya; Luca Sementa; Eric C. Tyo; Stephan Bartling; Karl-Heinz Meiwes-Broer; Sönke Seifert; Hirohito Hirata; Noritake Isomura; Sandeep Nigam; Chiranjib Majumder; Yoshihide Watanabe; Alessandro Fortunelli; Stefan Vajda.
- Funding Information:
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