期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-09666-0
关键词
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资金
- National Natural Science Foundation of China (NSFC)
- National Key Research and Development Project [2016YFF0204402]
- Program for Changjiang Scholars and Innovative Research Team in the University [IRT1205]
- Fundamental Research Funds for the Central Universities
- Long-Term Subsidy Mechanism from the Ministry of Finance
- Ministry of Education of PRC
- China Scholarships Council (CSC)
- Oregon State University
- E. I. duPont de Nemours Co.
- Northwestern University
- Dow Chemical Company
- DOE [DE-AC02-06CH11357]
Single atom catalyst, which contains isolated metal atoms singly dispersed on supports, has great potential for achieving high activity and selectivity in hetero-catalysis and electrocatalysis. However, the activity and stability of single atoms and their interaction with support still remains a mystery. Here we show a stable single atomic ruthenium catalyst anchoring on the surface of cobalt iron layered double hydroxides, which possesses a strong electronic coupling between ruthenium and layered double hydroxides. With 0.45 wt.% ruthenium loading, the catalyst exhibits outstanding activity with overpotential 198 mV at the current density of 10 mA cm(-2) and a small Tafel slope of 39 mV dec(-1) for oxygen evolution reaction. By using operando X-ray absorption spectroscopy, it is disclosed that the isolated single atom ruthenium was kept under the oxidation states of 4+ even at high overpotential due to synergetic electron coupling, which endow exceptional electrocatalytic activity and stability simultaneously.
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