中文摘要：

为了开发出同时具有优良的NOx储存和还原性能的催化剂，采用改进的溶胶凝胶法，制备了兼具贵金属和钙钛矿类优点的复合型NSR催化剂Pt／Ba／Ce／γ-Al2O3,通过X射线衍射（XRD）、比表面积（BET）、扫描电子显微镜（SEM）等技术对催化剂的孔结构及微观形貌进行了评价，并与Ba／Ce基催化剂进行了对比；并采用程序升温脱附试验（TPD）、程序升温表面反应（TPSR）和完全存储还原试验等方法测试了催化剂的热稳定性及脱附还原性能。研究结果表明：Pt／Ba／Ce／γ-Al2O3在孔结构及微观形貌方面均优于Ba／Ce基催化剂，同时具有良好的热稳定性及脱附还原性能，是一种性能优良的NSR催化剂。

英文摘要：

In order to develop an excellent NOx storage and reduction（NSR） catalyst, an improved solgel method was adopted to make a NSR catalyst of Pt/Ba/Ce/γ-Al2O3 which has the advantages of both noble type PBA and Perovskite type ABO3 catalysts. The pore structure and microstructure of the new catalyst were evaluated by XRD, BET and SEM techniques and compared with the Ba/Ce-base catalyst. The thermal stability and desorption/reduction performance of the new NSR catalyst were investigated by TPD, TPSR and complete storage reduction tests. The results indicate that the newly developed catalyst is better than the Ba/Ce-base catalyst in terms of the pore structure and microstructure and it has a good desorption/reduction performance as well as thermal stability. The catalyst of Pt/Ba/Ce/γ-Al2O3 is proven to have a good NSR performance.