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J Am Chem Soc. 2018 Jul 11;140(27):8563-8568. doi: 10.1021/jacs.8b04513. Epub 2018 Jun 21.

Preparation of 1T'-Phase ReS2 xSe2(1- x) ( x = 0-1) Nanodots for Highly Efficient Electrocatalytic Hydrogen Evolution Reaction.

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Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore.
Centre for Clean Environment and Energy, School of Environment & Science , Griffith University , Gold Coast Campus , Queensland 4215 , Australia.
School of Physical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China.
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , Chinese Academy of Sciences , Beijing 100190 , China.
Institute of Materials Research and Engineering (IMRE) , A*STAR (Agency for Science, Technology and Research) , Singapore 138634 , Singapore.
Institute of Chemical and Engineering Sciences , A*STAR (Agency for Science, Technology and Research) , Singapore 627833 , Singapore.
Collaborative Innovation Center of Quantum Matter , Beijing 100190 , China.


As a source of clean energy, a reliable hydrogen evolution reaction (HER) requires robust and highly efficient catalysts. Here, by combining chemical vapor transport and Li-intercalation, we have prepared a series of 1T'-phase ReS2 xSe2(1- x) ( x = 0-1) nanodots to achieve high-performance HER in acid medium. Among them, the 1T'-phase ReSSe nanodot exhibits the highest hydrogen evolution activity, with a Tafel slope of 50.1 mV dec-1 and a low overpotential of 84 mV at current density of 10 mA cm-2. The excellent hydrogen evolution activity is attributed to the optimal hydrogen absorption energy of the active site induced by the asymmetric S vacancy in the highly asymmetric 1T' crystal structure.


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