Boosting photoelectrocatalytic hydrogen evolution of Bi@OV-BiOBr/Cu3P high-low heterojunction with dual-channel charge transfer

A high-low heterojunction composite, oxygen vacancies BiOBr induced Bi precipitation Bi@O V -BiOBr/Cu 3 P with Bi-O-P chemical bond, was synthesized using a solvothermal method. Compared to single substance, the carrier lifetime and separation rate of Bi@O V -BiOBr/Cu 3 P were significantly improved. According to theoretical calculations and experimental results, Cu 3 P can be considered as a hole extractor to accelerate the separation of photogenerated carriers. The successful construction of Bi@O V -BiOBr/Cu 3 P high-low heterojunction with Bi metal can not only activate water molecules and reduce the dissociation energy barrier of water, but also separate and retain the highly reductive electrons. Bi metal…