La_(0.6)Sr_(0.4)Co_(1-x)Fe_xO_3钙钛矿的制备和催化性能研究  

Preparation and catalytic properties of La_(0.6)Sr_(0.4)Co_(1-x)Fe_xO_3 perovskite

作　　者：杨中正[1] 张媞[1] 张德伟 姚贤华[1] 李磊[1] YANG Zhongzheng;ZHANG Ti;ZHANG Dewei;YAO Xianhua;LI Lei(Henan Provincial Key Material Laboratory, North China University of Water Resources and Electric Power, Zhengzhou 450053, China)

机构地区：[1]华北水利水电大学河南省重点材料实验室,郑州450053

出　　处：《功能材料》2017年第12期12100-12103,12109,共5页Journal of Functional Materials

基　　金：河南省重点科技攻关资助项目(600201)

摘　　要：以La、Sr、Co和Fe的硝酸盐为主要原料,采用溶胶凝胶法合成La_(0.6)Sr_(0.4)Co_(1-x)Fe_xO_3钙钛矿(简称LSCF),并用LSCF对汽车尾气碳烟颗粒(Soot)催化性能进行研究。结果表明,钙钛矿呈多孔结构,颗粒为球形,分布均匀;随Fe取代Co的量增加,钙钛矿生成量增加、主晶面的间距增加,Fe取代量为0.4~0.8时,有利于钙钛矿的形成;加入钙钛矿催化剂后,Soot燃烧最大速率温度和完全燃烧温度大幅降低,有效提高了对Soot催化效果。La0.6Sr0.4Co1-xFexO3perovskites(LSCF)were prepared using the nitrates of La,Sr,Co and Fe as main materials by sol gel method,and its catalytic properties in the automobile exhaust smoke carbon particles(soot)were studied.The results show that the perovskite appears porous structure,particles are spherical and the particle distribution is uniform.The amount of forming perovskite and the spacing of its main crystal surface increase with the increase of substitution of Co by Fe.The Fe substitution is0.4to0.8,which is favorable to the formation of perovskite.Compared with the soot without perovskite,the maximum combustion rate and perfect combustion temperature of soot with perovskite are greatly reduced.The catalytic effect of soot is improved effectively.

关 键 词：La0.6Sr0.4Co1-xFexO3 制备 催化 碳烟颗粒 

分 类 号：TB38[一般工业技术—材料科学与工程]