Strong hetero-interface interaction in 2D/2D WSe2/ZnIn2S4 heterostructures for highly-efficient photocatalytic hydrogen generation

Green hydrogen is urgently required for sustainable development of human beings and rational construction of heterostructures holds great promising for photocatalytic hydrogen generation. Herein, 2D/2D WSe 2 /ZnIn 2 S 4 heterostructures with strong hetero-interface interaction and abundant contact were constructed via an impregnation-annealing strategy. Efficient charge transfer from ZnIn 2 S 4 to WSe 2 was evidenced by transient absorption spectroscopy in crafted heterostructures owing to the tight and 2D face-to-face contact. As a result, the prepared WSe 2 /ZnIn 2 S 4 heterostructures exhibited boosted photocatalytic performance and a highest hydrogen evolution rate of 3.377 mmol/(g h) was achieved with an apparent quantum yield of 45.7% at 420 nm. The work not only provides new strategies to achieve efficient 2D/2D heterostructures but also paves the way for the development of green hydrogen in the future. (c) 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies.