材料科学
碳化
异质结
化学工程
碳纤维
制氢
多孔性
复合数
电化学
催化作用
氢
电催化剂
兴奋剂
纳米技术
电极
复合材料
有机化学
光电子学
物理化学
化学
扫描电子显微镜
工程类
作者
Da Xu,Jun Ke,Hengyu Liu,Yafan Bi,Jie Liu
标识
DOI:10.1016/j.jmst.2023.09.015
摘要
Herein, two novel 3D porous Ni-based N doped carbon heterojunctions (NiS2@NC or Ni2P@NC) were successfully prepared through in situ carbonization and sulfurization or phosphorization by using flower-like Ni-based zeolite imidazolium framework as a precursor. Physiochemical and photoelectrochemical properties 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 semiconducting NiS2 formation take responsibility for the enhancement of H2 generation over the NiS2@NC hybrids. This work can provide a new strategy to construct efficient ZIFs-based photo/electrocatalysts with high performance of H2 production.
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