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  4. Pt-BaO催化剂的NOx储存-还原化学及结构-性能关系

催化学报 , 2011, 32(1): 17-26. doi: 10.3724/SP.J.1088.2011.00904

Pt-BaO催化剂的NOx储存-还原化学及结构-性能关系

胡准 1, , 孙科强 2, , 徐柏庆 3,

1.清华大学化学系有机光电子与分子工程教育部重点实验室,分子催化与定向转化研究室,北京100084

2.清华大学化学系有机光电子与分子工程教育部重点实验室,分子催化与定向转化研究室,北京100084

3.清华大学化学系有机光电子与分子工程教育部重点实验室,分子催化与定向转化研究室,北京100084

基金项目:   国家自然科学基金(20703028;20921001)  

关键词： 氮氧化物储存-还原 , 稀燃氮氧化物消除 , 铂-氧化钡催化剂 , 低铂含量 , 抗烧结

NOx Storage-Reduction Catalysis and Structure-Performance Relationship of Pt-BaO Catalyst

NOx储存-还原(NSR)技术是目前稀燃汽车尾气中NOx消除的最有前景的催化技术之一,NSR催化过程中稀燃/富燃条件的交替运行、NSR催化剂上化学计量反应与催化反应的耦合赋予了NSR催化过程迥异于常规连续流动气固相催化反应的特点.本文首先介绍了目前人们对Pt-BaO催化剂上NSR基本化学过程的认识;在此基础上,结合本研究组在低Pt载量抗烧结Pt-BaO催化剂方面的研究结果,分别评述了Pt-BaO及载体(助剂)的性质对催化剂性能的影响,并对现存的问题及未来的研究方向加以归纳和展望.

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