Volume 2, 2024

Variable-valence element doping mediated photogenerated electron trapping for selective oxidation reactions

Abstract

Photocatalytic selective oxidation provides a green and mild way of producing high-value added chemicals, whose conversion and selectivity are limited by complex oxidation pathways mediated by various reactive radical species. Thus, using photogenerated holes as an oxidant to directly drive these oxidation reactions could overcome the above problems, whereas the simultaneously formed electrons would cause the quenching of holes or the formation of other unfavorable reactive oxygen species that would affect the reaction efficiency. Herein, a variable-valence element doping method was proposed to realize hole-mediated photocatalytic selective oxidation. By taking Cu-doped Bi2WO6 as a typical prototype, we show that the doped Cu element with monovalent and divalent character can effectively trap photogenerated electrons, thereby boosting hole accumulation for selective oxidation reactions. As expected, Cu-doped Bi2WO6 exhibited excellent catalytic performances in oxidative coupling of benzylamines. This study provides a perspective on optimizing selective oxidation by hole regulation.

Graphical abstract: Variable-valence element doping mediated photogenerated electron trapping for selective oxidation reactions

Supplementary files

Article information

Article type
Paper
Submitted
08 Feb 2024
Accepted
20 Apr 2024
First published
24 Apr 2024
This article is Open Access
Creative Commons BY-NC license

EES. Catal., 2024,2, 980-986

Variable-valence element doping mediated photogenerated electron trapping for selective oxidation reactions

X. Zhong, Y. Zhao, L. Li, X. He, H. Wang, X. Zhang and Y. Xie, EES. Catal., 2024, 2, 980 DOI: 10.1039/D4EY00024B

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