Regulation of bandgap and interfacial conductivity: Construction of carbon-doped three-dimensional porous h-BN/rGO hybrid for hydrogen evolution
作者：李偉*，王菲，褚曉姍，劉小云，黨妍妍
關(guān)鍵字：Three-dimensional porous structure, Non-metallic doping, Template-free strategy, Hydrogen evolution, Simulated solar
論文來源：期刊
具體來源：https://doi.org/10.1016/j.apsusc.2021.150053
發(fā)表時(shí)間：2021年
Water splitting by photocatalysis technique is
regarded as an eco-friendly hydrogen production strategy. However, the poor
photoresponsivity and automatic electron-hole recombination greatly restrict
the HER performance of conventional semiconductor photocatalyst. Here, to utilize
the stable electrochemical property of hexagonal phase boron nitride (h-BN) and
improve its defect of wide bandgap (Eg ≈ 4.2
eV), reduced graphene oxide (rGO) was applied to construct three-dimensional
(3D) porous h-BN/rGO hybrid accompanied by a carbon-doping strategy without
template assistance, then a carbon-doped
3D porous h-BN/rGO (C-BNRG) hybrid with large BET surface area was successfully prepared. As the
synergistic effect of h-BN/rGO heterointerface and carbon-doping, the improved
photoresponsivity and electrochemical property were presented, and the
resultant 3D porous C0.4-BNRG hybrid presented not only greatly
enhanced HER activity (157.63 μmol·g-1·h-1) but
excellent durability in pH = 8.5, which was prominently higher than pristine
h-BN (～36.7
times), C-BN (～12.1
times) and 3D porous BNRG hybrid (～7.0
times). This study offers a template-free approach to develop non-metallic
based 3D porous hybrid for outstanding HER performance.