中文摘要：

机动车尾气排放造成的污染是倍受国际社会关注的问题,开发具有自主产权的机动车尾气净化催化技术是我国控制城市大气污染的重要措施。本研究采用“超声膜扩散”法制备了（LnO2）x-（ZrO2）1-x（Ln=Ce,Pr,Tb;x=0.4~0.9）储氧材料,对其储氧量、热稳定性、催化特性和抗老化性能进行了测量。结果表明,（LnO2）x-（ZrO2）1-x（Ln=Pr,Tb）显示出优于（CeO2）x-（ZrO2）1-x的综合性能,是机动车尾气净化三元催化重要的候选材料。

英文摘要：

In this study, oxygen storage materials （LnO2）- （ZrO2）1-x（Ln= Ce,Pr,Tb） were self- assembled using ＂ultrasound- assisted osmosis-diffusion chemical synthesis＂. Their oxygen storage capacity （OSC）, catalytic activity （light-off）, thermal stability and aging resistance were assessed using a flow micro - reactor and mass spectroscopy. From our study, （LnO2）- （ZrO2）1-x（Ln= Ce,Pr,Tb） exhibited superior catalytic properties to（CeO2）x- （ZrO2）1-x, and the catalysts of （LnO2）- （ZrO2）1-x（Ln= Ce,Pr,Tb） have been identified to be promising eardidates or alternatives as the TWC.