A two-electron migration mechanism co-constructed by K+ passivation and defect engineering for efficient TiO2 photocatalytic hydrogen evolution

Internal Electric Field-Modulated S-Scheme Ni3Se4/TiO2 Nanoparticle Heterojunction for Efficient Photocatalytic H2 Evolution

“…At present, the exploitation of environmentally friendly energy resources including H 2 , geothermal, hydropower, wind, and biomass energy has become an effective strategy for addressing energy crisis and environmental problems . Among them, H 2 is expected to be the most promising candidate due to its high energy density. , Photocatalytic water splitting is a reliable approach that can directly capture solar light to produce renewable H 2 without secondary pollution. , As we all know, the semiconductor photocatalytic reaction is mainly composed of three steps: (i) light absorption and the generation of photogenerated carriers; (ii) separation and migration of charge carriers; (iii) surface photocatalytic redox reactions on the surface of the catalyst. During the above process, the surface reaction is a rate-limiting step for a photocatalytic reaction, but only a minority of carriers can ultimately migrate to the surface to participate in the redox reaction, leading to poor photocatalytic activity.…”