Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (4): 1307.doi: 10.7503/cjcu20210098

• Article • Previous Articles    

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)

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

CLC Number: 

TrendMD: