稀土在机动车尾气催化净化中的应用与研究进展

Application and research progress of rare earth in automotive exhaust catalytic purification

随着我国机动车尾气排放法规日趋严格,对机动车尾气净化催化剂性能提出了更高的要求.稀土元素由于独特的4f电子层结构和储放氧性能等特性,在机动车尾气催化剂中得到广泛应用.本文综述了稀土元素在机动车尾气催化剂中的应用及相关机理研究现状,并依据京V排放法规要求探讨了最新排放限值对尾气净化催化剂性能的要求,分析了稀土在开发高性能催化剂中的作用,并对稀土在机动车尾气净化催化剂中的应用前景进行了展望.

With the emission regulations getting increasingly stringent in China, higher requirements for automotive exhaust purification catalysts are presented. Rare earth elements are widely used in automotive exhaust catalysts due to their special 4f electron shell structure and chemical properties such as oxygen storage capacity. The applications and research processes on the corresponding mechanisms of rare earths in automotive exhaust catalysts were summarized. The requirements of next generation catalysts were discussed based on the new emission limits in Beijing V regulation. Possible roles of rare earths in high performance catalysts automotive exhaust catalysts was prospected. were analyzed. The future application of rare earths in