Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (2): 654.doi: 10.7503/cjcu20200454

• Article • Previous Articles     Next Articles

Solvothermal Synthesis of 2D Metallic Transition Metal Disulfides for Efficient Electrocatalytic Hydrogen Evolution

YU Qiangmin1, ZHANG Zhiyuan1, LUO Yuting1, LI Yang2, CHENG Huiming1,3, LIU Bilu1()   

  1. 1.Shenzhen Geim Graphene Center,Tsinghua?Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China
    2.Institute for Superconducting and Electronic Materials,University of Wollongong,Wollongong 2500,Australia
    3.Shenyang National Laboratory for Materials Sciences,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
  • Received:2020-07-14 Online:2021-02-10 Published:2020-10-13
  • Contact: LIU Bilu E-mail:bilu.liu@sz.tsinghua.edu.cn

Abstract:

Different kinds of transition metal disulfides(TMDCs) were prepared via solvothermal method. The morphologic structure of TMDCs were controlled by tuning the injecting rates of the reaction precursor. The crystallization of the products could be improved by annealing treatment at high-temperature, and thus impro-ving the electrocatalytic activity of TMDC catalyst. The results of electrocatalytic hydrogen evolution in acidic electrolyte show that the metallic "flower-like" niobium disulfide(NbS2) exhibits excellent catalytic activity and stability. It possess a small overpotential of only 146 mV to achieve a current density of 10 mA/cm2. The current density almost shows no decays after 24 h continuous working at 10 mA/cm2. The excellent performance of NbS2 catalyst is attributed to the "flower-like" structure that can expose abundant active sites, and to the improvement of electrical conductivity and material quality after annealing treatment.

Key words: 2D Material, NbS2, Solvothermal synthesis, Electrocatalytic hydrogen evolution, Current density

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