A Review on Modulating Oxygen Vacancy Defect of Catalysts to Promote CO<sub>2</sub> Reduction Reaction to CO
Haixia Du, Zongping Shao
Abstract
Global warming and the energy crisis force the transformation of sustainable and environmentally friendly production and lead to the development of novel strategies and methodologies to contribute to enhancement of human well-being. Oxygen vacancy (V o ) defects engineering should be a cost-effective, green, and effective strategy for significantly promoting catalytic activity of CO 2 RR to CO via optimizing the electronic structure, improving the photo adsorption, facilitating the electron–hole separation, promoting the reactive radical production, etc. This review discusses the V o defect engineering methods, and then, the catalytic mechanism and role of V o for CO 2 RR to CO will illustrate how V o promotes CO 2 adsorption and activation and enhances the yield and selectivity of CO. Specifically, nanostructured perovskites with V o for CO 2 RR into CO are briefly illustrated, and the approaches for V o regeneration in the catalysts are mentioned. The challenges of the practical application of V o -engineered catalysts are also discussed, and prospects for effective CO 2 RR into CO based on V o defect engineering are proposed.