高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (2): 654.doi: 10.7503/cjcu20200454

• 研究论文 • 上一篇    下一篇

金属性二维过渡金属硫化物的溶剂热合成及电催化析氢性能

余强敏1, 张致远1, 罗雨婷1, 李洋2, 成会明1,3, 刘碧录1()   

  1. 1.清华大学深圳盖姆石墨烯中心, 清华?伯克利深圳学院/清华大学深圳国际研究生院, 深圳 518055
    2.伍伦贡大学超导和电子材料研究中心, 伍伦贡 2500, 澳大利亚
    3.中国科学院金属研究所, 沈阳材料科学国家实验室, 沈阳 110016
  • 收稿日期:2020-07-14 出版日期:2021-02-10 发布日期:2020-10-13
  • 通讯作者: 刘碧录 E-mail:bilu.liu@sz.tsinghua.edu.cn
  • 基金资助:
    国家自然科学基金(批准号(51722206);51920105002)、 广东省创新创业研究团队项目(2017ZT07C341);深圳市工业和信息化局项目(201901171523)

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

摘要:

采用溶剂热法制备了多种二维过渡金属硫化物(TMDCs), 在合成过程中通过调控反应前驱体的滴加速率来控制所得TMDCs的形貌和结构. 然后采用高温热处理来提高TMDCs的结晶性, 从而提升了其电催化活性. 在酸性电解液中进行电催化析氢性能测试. 结果表明, “花状”结构的金属性二维二硫化铌(NbS2)具有最佳的催化活性和稳定性, 在电流密度为10 mA/cm2时, 其过电位仅为146 mV, 持续工作24 h后电流密度几乎不衰减. 研究发现, 可充分暴露面内活性位点的“花状”结构以及高温处理后材料导电性的提高是二维NbS2具有优异电催化性能的主要因素.

关键词: 二维材料, 二硫化铌, 溶剂热合成, 电催化析氢, 电流密度

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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