Unraveling Charge State of Supported Au Single-Atoms during CO Oxidation

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 act...

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Published inJournal of the American Chemical Society Vol. 140; no. 2; pp. 554 - 557
Main Authors Zhou, Xiong, Shen, Qian, Yuan, Kaidi, Yang, Wenshao, Chen, Qiwei, Geng, Zhenhua, Zhang, Jialin, Shao, Xiang, Chen, Wei, Xu, Guoqin, Yang, Xueming, Wu, Kai
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 17.01.2018
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Summary: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 O2 at 400 K and accordingly the reaction activity is restored.
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ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.7b10394