Pt-BaO催化剂的NOx储存-还原化学及结构-性能关系

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...

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

NO_x storage-reduction (NSR) is one of the most promising techniques for lean NO_x abatement. The periodical lean/rich conditions and the combination of the stoichiometric reaction and the catalytic reaction on NSR catalyst distinguish the NSR catalysis from conventional continuous gas-solid catalytic process. This paper summarized the knowledge and understanding of the NSR catalysis on supported Pt-BaO catalyst. The fundamental chemical processes over the NSR catalysts were discussed first, followed by the role of Pt, BaO and support material. Problems and prospects in the study of NSR catalysts were presented.