Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 10, Pages 4923-4931Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta10989f
Keywords
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Funding
- U.S. Department of Energy, BESMaterials Science and Engineering [DE-AC-02-06CH11357]
- UChicago Argonne, LLC
- US Department of Energy, Scientific User Facilities [DE-AC-02-06CH11357]
- ERC-AG SEPON project
- U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- European Social Fund (ESF)
- federal state Mecklenburg-Vorpommern within the project Nano4Hydrogen
- Federal Ministry of Education and Research (BMBF) within the project Light2-Hydrogen
- Deutsche Forschungsgemeinschaft (DFG) [SFB652]
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Catalytic CO oxidation is unveiled on size-selected Pt-10 clusters deposited on two very different ultrathin (approximate to 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-10/UHV-alumina system undergoes a morphological transition in both the clusters and the substrate, and becomes closely akin to Pt-10/ALD-alumina, thus reconciling UHV-type surface-science and real-world experiments. The Pt-10 clusters, thoroughly characterized via 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. A coherent interdisciplinary picture then emerges for this catalytic system.
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