文献类型：期刊文献

英文题名：Two-Dimensional Multilayered Ferroelectric with Polarization-Boosted Photocatalytic Hydrogen Evolution

作者：Peng, Yu[1];Li, Liangyao[1];Xu, Yilin[1];Wang, Xing[1];Hou, Yu[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn,Minist Educ, Shanghai Engn Res Ctr Hierarch Nanomat,Key Lab Ult, Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Shanghai 200237, Peoples R China

年份：2025

卷号：15

期号：9

外文期刊名：CATALYSTS

收录：;EI(收录号：20254019262940);WOS:【SCI-EXPANDED(收录号:WOS:001579647900001)】；

基金：This research was funded by National Natural Science Foundation of China (52203330), Shanghai Municipal Natural Science Foundation (25ZR1401081), the Fundamental Research Funds for the Central Universities (JKD01251841, JKD01251505), Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400), Shanghai Titan Natural Science Development Foundation, and Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission).

语种：英文

外文关键词：photocatalytic hydrogen evolution; ferroelectric; spontaneous polarization; hybrid perovskite; piezo-photocatalysis; quasi-two-dimensional perovskite

摘要：Ferroelectric materials have attracted great attention for photocatalytic hydrogen (H2) evolution due to their internal depolarization fields that promote carrier separation and directional migration. However, conventional inorganic ferroelectrics often suffer from wide band gaps and low conductivity, limiting their solar-to-hydrogen conversion efficiency. Here, we report a two-dimensional (2D) multilayered perovskite ferroelectric, [butylammonium]2[ethylammonium]2Pb3I10 (BAPI), which integrates robust spontaneous polarization (Ps) and excellent semiconductor properties to enable efficient photocatalysis. Under simultaneous light and ultrasonic excitation, BAPI/Pt (1 wt%) achieves a H2 evolution rate of 1256 mu mol g-1 h-1, which is twice that under light alone, due to dynamic polarization modulation that mitigates ionic screening and enhances internal electric fields. Notably, this enhancement vanishes when BAPI transitions to a centrosymmetric, nonpolar phase at 323 K, confirming the critical role of Ps. These findings offer a new pathway toward high-performance ferroelectric photocatalysts for solar hydrogen production.