title: Highly Active Catalyst of Two-Dimensional CoS2/Graphene Nanocomposites for Hydrogen Evolution Reaction.
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.
authors.affiliation: School of Science, China University of Petroleum, Qingdao, 266580, People's Republic of China. xingwei@upc.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Xing
authors.affiliation: School of Science, China University of Petroleum, Qingdao, 266580, People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Science, China University of Petroleum, Qingdao, 266580, People's Republic of China.
authors.forename: Qingzhong
authors.initials: Q
authors.lastname: Xue
authors.affiliation: 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.
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Yan
keywords: Cobalt disulfide; Hydrogen evolution reaction; Two-dimensional structure