Progress of photothermal/thermal catalytic CO2 hydrogenation by metal-modified CeO2

Abstract

The realization of high value-added conversion of CO₂ is of great significance for the manufacturing of industrial chemicals and the reduction of greenhouse gas emissions. CeO₂, a star material known for its redox properties and oxygen storage capacity, has been widely utilized in photothermal and thermal catalytic applications of CO₂ hydrogenation. Metal modification on CeO₂ is a critical factor in introducing more oxygen vacancies, enhancing active sites and improving catalytic performance. In this review, recent advancements in CeO₂ catalysts modified by noble and non-noble metals in CO₂ hydrogenation are discussed, including classification of major products and mechanism pathways, and the effects of temperature and pressure. Additionally, we systematically explore the intrinsic mechanisms involved in photothermal and thermal catalytic reactions. Finally, the review provides a prospective outlook on the future development trends of metal-modified CeO₂-based CO₂ hydrogenation.