Oxygen vacancies in the catalyst: Efficient degradation of gaseous pollutants

Environmental problems, especially increasing atmospheric pollution, are urgently prompting new strategies to assist in sustainable development. Many studies have demonstrated that oxygen vacancies (OVs) play an important role in the degradation of gaseous pollutants by modulating the surface and electronic structure of catalysts. To clarify the oxygen vacancy effect, this paper reviews recent research advances in improving the performance of catalysts for the degradation of gaseous pollutants based on controlling OVs. The constitutive relationship between OVs and performance in the degradation of typical gaseous pollutants is elucidated. Various approaches for generating and characterizing OVs in catalysts are also summarized. Finally, some perspectives on the challenges and future opportunities for the development of oxygen-deficient catalysts are discussed. This review is significant for the study of the reaction mechanism of OVs with gaseous pollutants and the design of efficient catalysts.