Volume 1, 2023

In situ solvothermal reduction engineering enables delicate control over surface-rich oxygen vacancies on Bi2WO6 for highly efficient photocatalytic CO2 reduction

Abstract

The high binding energy of C[double bond, length as m-dash]O bonds in CO2 severely inhibits the photocatalytic CO2 reduction (PCR) activity. Constructing oxygen vacancies (Vo) is considered as a fascinating strategy to promote the capture and activation of CO2 molecules. The main challenge, however, lies in the delicate control of the Vo distribution, since the bulk Vo can act as a recombination centre for photogenerated electron–hole pairs. Here, an in situ solvothermal reduction strategy is presented by programming temperature to accurately control the Vo distribution on the catalytic surface. Taking Bi2WO6 as a model, surface-rich Vo on Bi2WO6 (Sur-Vo-BWO) were generated. The governable Vo distribution strategy remarkably increases the PCR dynamics with a high CO evolution rate for Sur-Vo-BWO (18.73 μmol g−1 h−1), which is 8.32 times more than that of the Vo-free control sample. This work paves a new pathway to implement delicate control of the Vo distribution on the catalysts for precisely tuned catalytic activity.

Graphical abstract: In situ solvothermal reduction engineering enables delicate control over surface-rich oxygen vacancies on Bi2WO6 for highly efficient photocatalytic CO2 reduction

Supplementary files

Article information

Article type
Communication
Submitted
27 Jan 2023
Accepted
07 Mar 2023
First published
13 Mar 2023
This article is Open Access
Creative Commons BY-NC license

EES. Catal., 2023,1, 495-503

In situ solvothermal reduction engineering enables delicate control over surface-rich oxygen vacancies on Bi2WO6 for highly efficient photocatalytic CO2 reduction

H. Liu, Y. Chen, W. Wang, X. He, Z. He, L. Li, S. Zeng, R. Cao and G. Zhang, EES. Catal., 2023, 1, 495 DOI: 10.1039/D3EY00019B

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