类钙钛矿型La1.6Ba0.4MO4-δ(M=Co,Ni,Cu)复合氧化物催化分解NO性能的研究  

CATALYTIC PERFORMANCE OF PEROVSKITE-LIKE OXIDES La_(1.6)Ba_(0.4)MO_(4-δ)(M= Co,Ni,Cu)FOR NO DIRECT DECOMPOSITION

作　　者：王东[1,2] 朱宇君[2] 袁福龙[2] 

机构地区：[1]韩山师范学院学生处,广东潮州521041 [2]黑龙江大学化学化工与材料学院,黑龙江省功能材料高校重点实验室,黑龙江哈尔滨150080

出　　处：《华南师范大学学报（自然科学版）》2010年第1期67-72,共6页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20876034);黑龙江大学杰出青年基金资助项目(JCL200802)

摘　　要：采用柠檬酸络合爆炸法合成了La1.6Ba0.4MO4-δ(M=Co,N,iCu)系列类钙钛矿型复合氧化物催化剂,通过XRD、H2-TPR等分析方法表征了其物相及氧化还原能力,并考察了该系列催化剂催化分解NO的活性.结果表明:Ba的掺杂对于不同过渡金属的氧化还原能力的影响程度各不相同,但都提高了过渡金属的氧化还原能力,从而提高了样品的催化活性,其中1123K时以Ni基类钙钛矿型的复合氧化物直接分解NO的催化活性相对最高,NO分解率达88%.The K2NiF4-type compounds,La1.6Ba0.4MO4-δ（M=Co,Ni,Cu） complex oxides were prepared by citrate combustion method and followed solid-state synthsis at high temperature.The characters of these samples were analyzed by XRD and H2-TPR.At the same time,their catalytic activities for NO direct decomposition were also tested.The results demonstrated that the influences of the various transitional metals at B sites on the oxide capability were different while Ba substituded part of La,and the doping of Ba has promoted the redox capability of catalysts and which leads to a good catalytic performance ultimately.It was found that Ni-base perovskite-like oxides doped with Ba performed the best activity among them.

关 键 词：过渡金属 氧化还原能力 类钙钛矿 NO分解 

分 类 号：O643.36[理学—物理化学]