Construction of Hollow H‐CuS/NiS 2 @CuS S‐Scheme Heterostructure Photocatalyst with an Excellent Hydrogen Evolution Performance

Heterojunction engineering is regarded as one of the most efficacious means to enhance the hydrogen evolution performance of photocatalysts. In this research, bimetal MOF‐74 is grown on hollow Cu 7 S 4 , and after vulcanization, H‐CuS/NiS 2 @CuS is obtained to form heterostructures. The experimental results indicate that the synthesized H‐CuS/NiS 2 @CuS has an outstanding photocatalytic hydrogen evolution rate of 17.66 mmol g −1 h −1 , and its photocatalytic hydrogen evolution performance is much higher than that of single transition metal sulfide. Within the S‐scheme heterojunction, the interfacial electric field causes a significant accumulation of photoelectrons on the conduction band of NiS 2 . Thus, it can maintain a high reducing property in the hydrogen evolution reaction and remarkably boosts the separation efficiency of photoelectrons and holes. This research offers a feasible scheme for the synthesis of highly efficient heterojunction photocatalysts.