Abstract
Herein,two novel 3D porous Ni-based N doped carbon heterojunctions(NiS2@NC or Ni2P@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(Ni2P@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.
基金项目
Knowledge Innovation Program of Wuhan-Shuguang Project(2022020801020366)
Science Research Foundation of Wuhan Institute of Technology(K201939)
Innovative Team program of Natural Science Foundation of Hubei Province(2021CFA032)
Natural Science Foundation of Hebei Province(E2022502071)
Fundamental Research Universities(2022MS110)
NETL
NSTL
万方数据