低温燃烧法制备La_(1-x)Cs_xFeO_3复合氧化物及其贫燃条件下对NO催化净化的活性与机理  

Preparation of La_(1-x)Cs_xFeO_3 complex oxides by low-temperature combustion sythesis and its catalytic activity and mechanism for purification of NO under lean-burn condition

作　　者：王海燕[1] 张国[2] 李丽[2] 张新[2] 袁福龙[2] 付宏刚[2] 

机构地区：[1]哈尔滨师范大学呼兰分院化学系,黑龙江哈尔滨150500 [2]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2005年第1期25-27,33,共4页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(20271019)

摘　　要：采用低温燃烧合成法制备了Cs掺杂的La1-xCsxFeO3 系列复合钙钛矿氧化物。X射线衍射分析和IR结果表明:x=0 0-0 6时都形成了钙钛矿结构。催化性能测试发现,x=0 5时催化活性最好,TPR分析证明:其催化活性与高价铁离子的出现及氧空位有关。A series materials of complex oxides La_(1-x)Cs_xFeO_3 are synthesized by low-temperature combustion sythesis method. XRD and IR result shows that the crystal structure of La_(1-x)Cs_xFeO_3(x=0.0-0.6) is perovskite-type oxide. Catalytic activity test indicate that the catalyst has a maximum at x=0.5. Combined with TPR curves, it can be deduced that catalytic activity of the perovskite-type oxides is closely related to the higher valent irons and oxygen vacancies.

关 键 词：La1-xCsxFeO3复合氧化物 掺杂 一氧化氮 低温燃烧合成法 

分 类 号：O643.32[理学—物理化学]