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Anions‐Exchange‐Induced Efficient Carrier Transport at CsPbBr x Cl 3‐x /TiO 2 Interface for Photocatalytic Activation of C(sp 3 )−H bond in Toluene Oxidation
Author(s) -
Zhao Yizhou,
Dai Yi,
Wang Qiuhe,
Dong Yuanyuan,
Song Tinglu,
Mudryi Alexander,
Chen Qi,
Li Yujing
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202100223
Subject(s) - photocatalysis , perovskite (structure) , catalysis , halide , heterojunction , materials science , toluene , chemistry , crystallography , inorganic chemistry , organic chemistry , optoelectronics
Inspired by the unique band structure of CsPbBr 3 , we have developed an asymmetric Cl‐exchange strategy based on the CsPbBr x Cl 3‐x /TiO 2 heterojunction‐type catalyst and achieved photocatalytic activation of C(sp 3 )−H bond using the toluene oxidation reaction as a proof‐of‐concept application. The anion exchange at the supported CsPbBr 3 surface results in the CsPbBr x Cl 3‐x /TiO 2 structure with an asymmetric distribution of halide. The resultant heterojunction‐type catalysts exhibit significantly improved photocatalytic activity for toluene oxidation reaction with the highest benzaldehyde production rate at 1874 μmol g −1 h −1 (∼4 times that of the naked CsPbBr 3 nanocrystals). The remarkable photocatalytic performance can be ascribed to the improved carrier transport at CsPbBr x Cl 3‐x /TiO 2 interface enabled by the unique band structure due to the asymmetric halide distribution, verified by the micro‐strain discovered through the X‐ray diffraction. This work demonstrates a new pathway to fabricate highly‐efficient halide perovskite heterojunction‐type catalysts for photocatalytic activation of C(sp 3 )−H bond.