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.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
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)
关键词
过渡金属
氧化还原能力
类钙钛矿
NO分解
transitional metal
redox capability
perovskite-like
NO decomposition
作者简介
王东（1982-），女，黑龙江哈尔滨人，韩山师范学院助理研究员，Email：dongdong_19820101@163．com．
