Role of oxygen vacancy in metal oxides for photocatalytic CO2 reduction

Role of oxygen vacancy in metal oxides for photocatalytic CO2 reduction

Applied Catalysis B: Environmental

10.1016/j.apcatb.2022.122079

http://dx.doi.org/10.1016/j.apcatb.2022.122079

Wenbin Jiang, Hongyi Loh, Beverly Qian Ling Low, Houjuan Zhu, Jingxiang Low, Jerry Zhi Xiong Heng, Karen Yuanting Tang, Zibiao Li, Xian Jun Loh, Enyi Ye, Yujie Xiong

Catalysis, Process Chemistry and Technology, General Environmental Science

17 October 2022

Jiang, W., Loh, H., Low, B. Q. L., Zhu, H., Low, J., Heng, J. Z. X., Tang, K. Y., Li, Z., Loh, X. J., Ye, E., & Xiong, Y. (2023). Role of oxygen vacancy in metal oxides for photocatalytic CO2 reduction. Applied Catalysis B: Environmental, 321, 122079. https://doi.org/10.1016/j.apcatb.2022.122079

Photocatalytic conversion of greenhouse gas CO2 into valuable solar fuels represents a promising technology for addressing the global energy crisis and environmental issues simultaneously. In such a technology, the development of efficient photocatalysts is a central task for pushing forward the practical application of photocatalytic CO2 reduction. Due to their low cost, high redox capability, and environmental friendliness, metal oxide-based photocatalysts have been extensively employed for CO2 reduction. Moreover, oxygen vacancy engineering in metal oxides has gradually emerged as a versatile approach to enhancing their photocatalytic performance for CO2 reduction. In this article, the state-of-the-art progress in oxygen vacancy engineering, including its synthesis, characterization, and recent advancement in photocatalytic CO2 reduction, is reviewed. In particular, the roles of oxygen vacancy in promoting the three basic steps in photocatalytic CO2 reduction, i.e., light absorption, charge separation, and surface CO2 conversion, are discussed in detail. The current challenges and future opportunities of engineering oxygen vacancy in metal oxide-based photocatalysts for efficient CO2 reduction are also addressed. This review aims to inspire more creative works on the rational design of oxygen vacancy that maximizes its function, hence accelerating the discovery of high-performance photocatalysts for CO2 reduction.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

This research is supported by core funding from: Science and Engineering Research Council (SERC)
Grant Reference no. : N.A

Natural Science Foundation of China (21725102, 91961106)

https://oar.a-star.edu.sg/communities-collections/articles/18719

0926-3373

Institute of Materials Research and Engineering