Halide Perovskites for Solar Hydrogen Production: Moving from Hydrohalic Acid toward Water Splitting

作者：Yaqiang Wu, Baibiao Huang, Peng Wang · 发表于：Accounts of Chemical Research · 年份：2025 · DOI：10.1021/acs.accounts.5c00602 · 被引用次数：3 · 研究领域：Advanced Photocatalysis Techniques、Perovskite Materials and Applications、TiO2 Photocatalysis and Solar Cells

Conspectus The conversion of solar energy into chemical fuels via photocatalytic water splitting represents a promising pathway to sustainable hydrogen production. Halide perovskites (HPs) have emerged as remarkable photocatalysts owing to their strong visible-light absorption, tunable bandgaps, long carrier diffusion lengths, and defect-tolerant electronic structures. The photocatalytic hydrogen evolution in aqueous solution was first reported in 2016, wherein the inherent aqueous instability of HPs was addressed through a dissolution–precipitation dynamic equilibrium between the halide perovskite (HP) powders and HP-saturated hydroiodic acid (HI) solution. Early systems, however, faced fundamental limitations: (1) limited charge utilization due to the high carrier recombination and insufficient surficial reactive sites; (2) restriction to the hydrogen evolution half-reaction in concentrated HI solution, which was an uneconomical material source and also caused thermodynamic inefficiency for I – oxidation instead of water splitting. Over the past decade, our research has focused on addressing these challenges through a combination of material- and system-level innovations. On the materials side, we have explored cocatalyst loading, heterostructure and composite construction, and compositional tuning at the A-, B-, and X-sites to improve carrier utilization efficiency and accelerate surface reaction kinetics, thereby improving photocatalytic performance. These efforts have en...