Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 140, Issue 2, Pages 554-557Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b10394
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Funding
- MOST, China [2017YFA0204702]
- NSFC, China [21333001, 91527303]
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Thermally stable Au single-atoms supported by monolayered CuO grown at Cu(110) have been successfully prepared. The charge transfer from the CuO support to single Au atoms is confirmed to play a key role in, tuning the activity for CO oxidation. Initially, the negatively charged Au single-atom is active for CO oxidation with its adjacent lattice O atom depleted to generate an O vacancy in the CuO monolayer. Afterward, the Au single-atom is neutralized, preventing further CO reaction. The produced O vacancy can be healed by exposure to O-2 at 400 K and accordingly the reaction activity is restored.
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