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Nanoscale Res Lett. 2015 Dec;10(1):488. doi: 10.1186/s11671-015-1198-3. Epub 2015 Dec 21.

Highly Active Catalyst of Two-Dimensional CoS2/Graphene Nanocomposites for Hydrogen Evolution Reaction.

Author information

1
School of Science, China University of Petroleum, Qingdao, 266580, People's Republic of China. xingwei@upc.edu.cn.
2
School of Science, China University of Petroleum, Qingdao, 266580, People's Republic of China.
3
State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, China University of Petroleum, Qingdao, 266580, People's Republic of China. zfyancat@upc.edu.cn.

Abstract

Hydrogen evolution reaction (HER) by electrochemical water splitting using new promising non-precious metal catalysts shows great potential for clean energy technology. The design and fabrication of a high-performance electrode material based on cobalt disulfide/reduced graphene oxide (CoS2/RGO) nanocomposites is reported by a one-step hydrothermal method. Benefiting from its structural advantages, namely, large amount of exposed surface, fast charge transfer, and synergistic effect between CoS2 and RGO, the as-prepared nanocomposites are exploited as a catalyst for the HER. The results indicate that CoS2/RGO-5 % exhibits the best performance of hydrogen evolution and the smallest overpotential of 159 mV to achieve a 15 mA cm(-2) current density, possessing the easiest releasing of hydrogen gas and the highest charge transfer rate, as well as remarkable stability.

KEYWORDS:

Cobalt disulfide; Hydrogen evolution reaction; Two-dimensional structure

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