J. Mater. Sci. Technol. ›› 2024, Vol. 179: 66-78.DOI: 10.1016/j.jmst.2023.09.015

• Research Article • Previous Articles     Next Articles

In situ construction of Ni-based N doped porous carbon induced by sulfurization or phosphorization for synergistically enhanced photo/electrocatalytic hydrogen evolution

Desheng Xua, Jun Kea, Hengyu Liua, Yafan Bia, Jie Liub   

  1. aSchool of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China;
    bDepartment of Environmental Science & Engineering, North China Electric Power University, Baoding 071003, China
  • Received:2023-06-11 Revised:2023-08-08 Accepted:2023-09-08 Published:2024-04-20 Online:2024-04-15
  • Contact: *E-mail address: jke@wit.edu.cn (J. Ke).

Abstract: Herein, two novel 3D porous Ni-based N doped carbon heterojunctions (NiS2 @NC or Ni2 P@NC) were suc-cessfully prepared through in situ carbonization and sulfurization or phosphorization by using flower-like Ni-based zeolite imidazolium framework as a precursor. Physiochemical and photoelectrochemical prop-erties were investigated to explore photoinduced charge separation and transfer in the heterojunction. Meanwhile, the photo/electrocatalytic hydrogen evolution performances were evaluated systematically. In contrast to the controlled Ni-ZIF and Ni@NC composites, the expected flower-like NiS2 @NC compounds show significantly enhanced photo/electrocatalytic hydrogen evolution performances, which is 13.8 times that of Ni-ZIF and 1.8 times that of Ni@NC. Furthermore, a phosphorus-decorated composite (Ni2 P@NC) was synthesized for better comparison, which also displays apparently improved photo/electrocatalytic hydrogen evolution activities. The findings present that the synergistic effect of S doping and semicon-ducting NiS2 formation take responsibility for the enhancement of H2 generation over the NiS2 @NC hy-brids. This work can provide a new strategy to construct efficient ZIFs-based photo/electrocatalysts with high performance of H2 production.

Key words: Solar utilization, Zeolite imidazolium framework, Carbon, Doping, Heterojunction, Hydrogen evolution