Oxygen storage materials play a very important role in the purification of automotive tail gas.The thermal stability,oxygen storage capacity and redox properties of ceria-zirconia solid solutions can be improved by doping appropriate amount of rare earth metals,alkali metals and transition metals.In this paper,the influence of different metals doping in ceria-zirconia solid solutions are reviewed,including rare earth metals(e.g.Y,La,Pr and Nd),alkali metal(e.g.Ba,Ca,Mg and K)and transition metals(e.g.Co,Fe,Ni and Mn).Morover,the preparation methods of ceria-zirconia solid solutions in recent years are summarized.%储氧材料在汽车尾气净化中占据非常重要的地位.掺杂适量的稀土、碱金属以及过渡金属等有利于提高铈锆固溶体的热稳定性、储氧性能和氧化还原性能.综述了Y、La、Pr、Nd等稀土的掺杂,K、Ba、Ca、Mg等碱金属的掺杂,以及Co、Fe、Ni、Mn等过渡金属的掺杂对铈锆固溶体性能的影响,并总结了近年来铈锆固溶体的制备方法.
展开▼
