1. Electronic structure: The internal electronic structure of rare earth elements is special, which makes their oxides have good electrical properties, such as lanthanide oxides, which can reduce antioxidants to oxidants, thereby improving the stability of catalysts.
2. Crystal structure: Rare earth oxides have a complex and rich crystal structure, in which a large number of oxygen vacancies can help rare earth elements exist in different oxidation states, thereby improving the activity and selectivity of catalysts.
3. Physical properties: Rare earth oxides have good thermal and chemical stability, and can exist stably in harsh environments such as high temperature and high pressure.