Research Advances in Rare Earth Oxide-Based Catalysts for Soot Combustion

Environmental issues exert a significant influence on the human life. Soot particles have attracted attention as a major source of pollution. Significant progress has been made in the research of efficient soot combustion catalysts. The distinctive bonding properties on the 4 f orbitals of rare earth elements exhibit excellent catalytic performance for soot combustion. This comprehensive review explores recent advancements in the design of catalysts based on rare earth oxides, with a specific focus on various catalytic materials (La-based, Ce-based, Pr-based and other rare earth elements), synthesis methods, catalyst morphology, catalytic performance and the intricate mechanisms governing their performance in catalytic soot combustion. The activity and selectivity of different rare earth catalysts in various reaction atmospheres are also summarized in the article. Finally, the challenges associated with rare earth oxide-based catalysts and their potential for future development in the soot combustion are highlighted. This review establishes a fundamental basis for the further design of catalytic materials that exhibit enhanced efficiency and stability. Summary of the recent advancements in rare earth oxide-based catalysts (Ce-based, La-based, Pr-based and other elements) for efficient and stable soot combustion. Focused on the synthesis methods, morphology control, facets, defects and ion doping, catalytic performance, and mechanisms while addressing challenges and future prospects in this field are proposed in this review.image