期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 36, 页码 14190-14199出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b05268
关键词
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资金
- European Research Council [681292]
- Ministry of Science and Technology, Taiwan
- MOST [107-2628-M-002-015-RSP]
Single-atom catalysts exhibit well-defined active sites and potentially maximum atomic efficiency. However, they are unsuitable for reactions that benefit from bimetallic promotion such as the oxygen evolution reaction (OER) in an alkaline medium. Here we show that a single-atom Co precatalyst can be in situ transformed into a Co-Fe double-atom catalyst for the OER. This catalyst exhibits one of the highest turnover frequencies among metal oxides. Electrochemical, microscopic, and spectroscopic data, including those from operando X-ray absorption spectroscopy, reveal a dimeric Co-Fe moiety as the active site of the catalyst. This work demonstrates double-atom catalysis as a promising approach for the development of defined and highly active OER catalysts.
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