高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (4): 1307.doi: 10.7503/cjcu20210098

• 研究论文 • 上一篇    

尖晶石型过渡金属硫化物CuCo2S4与MoS2复合材料的制备及电催化析氢性能

张楠1(), 韩阔1, 李悦1, 王春茹1, 赵凤1, 韩冬雪2(), 牛利2   

  1. 1.中国石油大学(北京)理学院, 重质油国家重点实验室, 北京 102249
    2.广州大学分析科学技术研究中心, 化学化工学院, 广州 510006
  • 收稿日期:2021-02-18 出版日期:2021-04-10 发布日期:2021-04-08
  • 通讯作者: 张楠 E-mail:zhangnan@cup.edu.cn;dxhan@gzhu.edu.cn
  • 作者简介:韩冬雪, 女, 博士, 教授, 主要从事光电敏感材料制备、 光电化学传感及分析仪器设计研究. E-mail: dxhan@gzhu.edu.cn
  • 基金资助:
    国家自然科学基金(22002187)

Core-shell Heterostructure Construction Between Thiospinel CuCo2S4 and MoS2 for Improved Hydrogen Evolution Electrocatalytic Performance

ZHANG Nan1(), HAN Kuo1, LI Yue1, WANG Chunru1, ZHAO Feng1, HAN Dongxue2(), NIU Li2   

  1. 1.State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum,Beijing 102249,China
    2.Center for Advanced Analytical Science,c/o School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China
  • Received:2021-02-18 Online:2021-04-10 Published:2021-04-08
  • Contact: ZHANG Nan E-mail:zhangnan@cup.edu.cn;dxhan@gzhu.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(22002187)

摘要:

通过简单的三步水热法实现尖晶石型过渡金属硫化物CuCo2S4与MoS2的复合, 以三维多孔泡沫镍(NF)为基底, 制得自支撑催化电极MoS2@CuCo2S4-Ni3S2/NF. 高分辨透射电子显微镜(HRTEM)、 X射线衍射(XRD)、 X射线光电子能谱(XPS)、 扫描电子显微镜(SEM)及透射电子显微镜(TEM)表征结果表明, MoS2纳米片层密集均匀地生长在CuCo2S4-Ni3S2纳米棒表面, 并形成多级核壳结构. 其碱性条件下(1 mol/L KOH)的电催化析氢性能研究结果表明, MoS2与CuCo2S4的复合和特殊形貌的构筑有效提高了电化学活性面积和电子传导效率, 达到10, 100和300 mA/cm2电流密度分别仅需116, 231和282 mV的过电位, 经2000次循环伏安扫描后, 100 mA/cm2电流密度所对应的过电位仅增大6%, 展现出优异的电催化析氢催化活性及较好的稳定性.

关键词: 二硫化钼, 尖晶石型过渡金属硫化物, 电催化, 析氢反应

Abstract:

The heterostructure construction between thiospinel transition metal sulfide CuCo2S4 and MoS2 was achieved by a simple three-step hydrothermal process. Ni foam(NF) was employed as the substrate and the self-supported MoS2@ CuCo2S4-Ni3S2/NF electrode was obtained. The high resolution transmission electron microscopy(HRTEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM) and transmission electron microscopy(TEM) verified that MoS2 nanosheets grown onto the surface of CuCo2S4-Ni3S2 nanorods densely and uniformly, which formed a hierarchical core-shell structure. The electrocatalytic performance of MoS2@CuCo2S4-Ni3S2/NF for hydrogen evolution reaction(HER) in 1 mol/L KOH verified that the rational hybridization between MoS2 and CuCo2S4 as well as the construction of the speci-fic nanostructure significantly increased the electrochemical surface area and efficiently improved the electron transfer. Therefore, MoS2@CuCo2S4-Ni3S2/NF only needed overpotential of 116, 231, 282 mV, respectively, to reach the current density of 10, 100, 300 mA/cm2. The overpotential corresponded to 100 mA/cm2 only increased 6% after 2000 cycles of CV measurement. Therefore, outstanding HER catalytic activity and stability have been achieved by this MoS2@CuCo2S4-Ni3S2/NF self-supported electrode.

Key words: Molybdenum disulfide, Thiospinel transition metal sulfide, Electrocatalysis, Hydrogen evolution reaction

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