文献类型：期刊文献

英文题名：Facet junction of two-dimensional metal halide perovskite for photocatalytic hydrogen evolution

作者：Wang, Xing[1];Sui, Xinyuan[1];Wang, Mengmin[1];Zheng, Zhaoke[2];Yuan, Haiyang[1];Yang, Shuang[1];Yang, Hua Gui[1];Peng, Yu[1];Hou, Yu[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

年份：2025

卷号：365

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20245117529717);WOS:【SCI-EXPANDED(收录号:WOS:001409467900001)】；

基金：This work was financially supported by National Ten Thousand Talent Program for Young Top-notch Talent, National Natural Science Foundation of China (22379044, 52203330) , the Science and Technology Commission of Shanghai Municipality (21DZ1207101, 23520710700) , the Key Program of the National Natural Science Foundation of China (22239001) , Shanghai Pilot Program for Basic Research (22TQ1400100-5) , "Dawn" Program of Shanghai Education Commission (22SG28) , Shanghai Municipal Natural Science Foundation (22ZR1418000) , Shanghai Sailing Program (22YF1410000) , Post-doctoral Research Foundation of China (2021M701190) , the Fundamental Research Funds for the Central Universities (JKD01241607, JKVD1241041) , Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400) and Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission) .

语种：英文

外文关键词：Metal halide materials; Two-dimensional perovskites; Facet junction; Carrier dynamics; Photocatalytic hydrogen evolution

摘要：Metal halide perovskites (MHPs) have emerged as promising candidates for photocatalytic hydrogen production due to their outstanding photoelectronic properties. Among various MHP-based photocatalysts, two-dimensional (2D) perovskites demonstrate markedly enhanced photocatalytic performance compared to their threedimensional (3D) counterparts, despite exhibiting narrower absorption ranges, smaller absorption coefficients, and inferior carrier transport characteristics. In this study, we conduct a comprehensive instigation into the carrier dynamics of 2D Ruddlesden-Popper (RP) phase perovskite, exemplified by (cyclohexylammonium)2PbI4 (CHPI). Our findings reveal the presence of a facet junction within 2D perovskites that significantly facilitates carrier separation. Density functional theory (DFT) calculations suggest that this facet junction originates from the energy level difference between {001} and {010} facets of CHPI, originating from the structural anisotropy of 2D materials. Benefitting from the built-in electric field generated by the facet junction, the photocatalytic hydrogen production rate of 2D MHP, 1.0 wt% Pt/CHPI, reaches 639.6 mu mol h- 1, approximately 93 times higher than that of 3D counterparts, 1.0 wt% Pt/MAPbI3 (6.90 mu mol h- 1) with the same mass. As a groundbreaking work, this study demonstrates the existence of crystal facet heterojunctions in MHP materials, providing a platform for exploring high-performance MHP catalysts.