Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-04954-7
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Funding
- National Natural Science Foundation of China [21431006, 21761132008, 51702312, 21703228]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSWSLH036]
- National Basic Research Program of China [2014CB931800]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007]
- Fundamental Research Funds for the Central Universities [WK2340000076]
- Recruitment Program of Global Youth Experts
- China Postdoctoral Science Foundation [2016M592063]
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Transition metal dichalcogenide materials have been explored extensively as catalysts to negotiate the hydrogen evolution reaction, but they often run at a large excess thermodynamic cost. Although activating strategies, such as defects and composition engineering, have led to remarkable activity gains, there remains the requirement for better performance that aims for real device applications. We report here a phosphorus-doping-induced phase transition from cubic to orthorhombic phases in CoSe2. It has been found that the achieved orthorhombic CoSe2 with appropriate phosphorus dopant (8 wt%) needs the lowest over-potential of 104 mV at 10 mA cm(-2) in 1M KOH, with onset potential as small as -31 mV. This catalyst demonstrates negligible activity decay after 20 h of operation. The striking catalysis performance can be attributed to the favorable electronic structure and local coordination environment created by this doping-induced structural phase transition strategy.
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