Flux-assisted synthesis of tungsten-doped layered perovskite oxychloride with promoted visible-light-responsive O2 evolution performance

Xiangyao Song; Shiwen Du; Xiangying Xing; Beibei Dong; Zhaochi Feng; Fei Cheng

doi:10.1039/d2cc05806e

Flux-assisted synthesis of tungsten-doped layered perovskite oxychloride with promoted visible-light-responsive O₂ evolution performance

Chem Commun (Camb). 2023 Jan 26;59(9):1225-1228. doi: 10.1039/d2cc05806e.

Authors

Xiangyao Song¹, Shiwen Du², Xiangying Xing¹, Beibei Dong¹, Zhaochi Feng², Fei Cheng¹

Affiliations

¹ School of Chemistry and Chemical Engineering, Hebei University of Technology, Tianjin 300130, China. bbdong@hebut.edu.cn.
² Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.

PMID: 36629874
DOI: 10.1039/d2cc05806e

Abstract

Here, we successfully prepared Ba₂Bi₃Ta₂O₁₁Cl via a simple one-step molten salt method and adjusted its crystal morphology and structure, based on which the O₂-evolving activity was significantly improved. In addition, W doping promotes the charge separation efficiency, lowers the energy barrier for water oxidation reaction, and thus improves the activity. Finally, the optimized W-doped sample after molten salt treatment shows the best O₂ production activity (55 μmol h^-1) without loading any cocatalyst, which is 6 times higher than that of pristine Ba₂Bi₃Ta₂O₁₁Cl and 2 times higher than that of the undoped Ba₂Bi₃Ta₂O₁₁Cl treated with molten salt, respectively.