多元稀土氧化物复合型催化剂及其制备方法和应用
By forming a La2O3 and Nd-O solid solution under high temperature and pressure and then performing stepwise calcination, a multi-element rare earth oxide composite catalyst was prepared, which solved the problems of scarce precious metal catalyst resources and insufficient uniformity of rare earth oxide composite catalysts, and achieved a highly efficient purification effect for automobile exhaust.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEBEI UNIV OF TECH
- Filing Date
- 2025-12-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing precious metal catalysts for automobile exhaust purification suffer from resource scarcity and high cost, while rare earth oxide composite catalysts have shortcomings in terms of nanoscale uniformity and composite system uniformity, which affect catalytic performance.
By carrying out solid-phase reaction under high temperature and high pressure oxygen partial pressure environment, a La2O3 and Nd-O solid solution is formed, the valence state distribution of Nd element is regulated, and a spherical micromorphology is formed through a step-by-step calcination process to prepare a multi-element rare earth oxide composite catalyst, which is suitable for exhaust gas treatment of different vehicle models.
It improves the catalyst's reactivity and specific surface area, reduces the amount of precious metals used, and achieves efficient purification of exhaust gases from different vehicle models, adapting to the catalytic requirements of various vehicle types.
Smart Images
Figure CN121648903B_ABST