Unlocking Interfacial Interactions of In Situ Grown Multidimensional Bismuth‐Based Perovskite Heterostructures for Photocatalytic Hydrogen Evolution

作者：Jianpei Feng, Chun Hong Mak, Guohua Jia, Bin Han, Hsin‐Hui Shen, Shella Permatasari Santoso, Ji‐Jung Kai, Mingjian Yuan, Haisheng Song, Juan Carlos Colmenares, Hsien‐Yi Hsu · 发表于：Advanced Energy Materials · 年份：2024 · DOI：10.1002/aenm.202402785 · 被引用次数：13 · 研究领域：Perovskite Materials and Applications、Advanced Photocatalysis Techniques、Quantum Dots Synthesis And Properties

Abstract To combat the energy crisis and environmental pollution, developing renewable energy technology such as hydrogen (H 2 ) production is necessary. The sulfur–iodine thermochemical cycle has high commercial potential in conducting hydrogen iodide (HI) splitting for H 2 generation, but it requires high‐temperature conditions. In comparison, photocatalytic HI splitting of halide perovskites is non‐polluted and low‐cost for H 2 production at room temperature. Herein, an in situ constructed multidimensional bismuth (Bi)‐based 3D/2D EDABiI 5 /MA 3 Bi 2 I 9 perovskite heterojunction is developed first by synergistically integrating dimensionality control with heterostructure engineering. Accordingly, the optimal EDABiI 5 /MA 3 Bi 2 I 9 without any co‐catalysts exhibits the H 2 evolution rate of 213.63 µmol h −1 g −1 under irradiation. Equally importantly, interfacial dynamics of solid/solid and solid/liquid interfaces play a crucial role in photocatalytic performance. Therefore, using temperature‐dependent transient photoluminescence and electrochemical voltammetric techniques, it is confirmed that the exciton transportation of EDABiI 5 /MA 3 Bi 2 I 9 is accelerated by stronger electronic coupling arising from an enhanced overlap of electronic wavefunctions. Moreover, the effective diffusion coefficient and electron transfer rate of EDABiI 5 /MA 3 Bi 2 I 9 demonstrate efficient heterogeneous electron transfer, resulting in improved photocatalytic hydrogen production. Conseque...