La_(1-x)Ba_xCo_(0.8)Ni_(0.2)O_3复合氧化物的制备及其对CO催化燃烧性能  

Preparation of La_(1-x)Ba_xCo_(0.8)Ni_(0.2)O_3 Composite Oxide and Its Catalytic Performance in Carbon monoxide Combustion

作　　者：许延辉[1,2,3] 刘瑞金[3] 崔建国[1,2] 张旭霞[1,2] 任树林[3] 

机构地区：[1]稀土冶金及功能材料国家工程研究中心,内蒙古包头014030 [2]包头稀土研究院,内蒙古包头014030 [3]内蒙古大学化学化工学院,内蒙古呼和浩特010021

出　　处：《中国稀土学报》2010年第3期302-305,共4页Journal of the Chinese Society of Rare Earths

基　　金：科技部国际合作资助项目(2007DFA51020)

摘　　要：采用溶胶-冷冻干燥法制备了La1-xBaxCo0.8Ni0.2O3（x=0-0.4）催化剂粉体。用X射线衍射（XRD）、比表面测定仪（BET）和扫描电子显微镜（SEM）等分析手段对催化剂的结构和形貌进行了表征,并考察了催化剂的最佳焙烧温度和催化活性。研究表明,催化剂的最佳焙烧温度为600℃。掺杂Ba2＋后,催化剂以钙钛矿相和BaCO3相共存,不能形成单一的钙钛矿型结构。催化活性测试表明,当x=0.2时,催化剂对CO的催化活性最高（T90%=126℃）。The La1-xBaxCo0.8Ni0.2O3（x=0~0.4） catalysts were synthesized by sol-freeze drying method and the crystal structure,micrograph were characterized by XRD,BET and SEM.The optimum calcination temperature and catalytic activity of catalysts were studied.The results showed that the optimum calcination temperature was 600 ℃.The perovskite phase and BaCO3 phase coexisted after doping Ba2＋ to La1-xBaxCo0.8Ni0.2O3 catalysts.The catalytic activity of the catalyst with x=0.2 was the highest for CO catalytic combustion（T90%=126 ℃）.

关 键 词：溶胶-冷冻干燥法 钙钛矿 催化燃烧 CO 稀土 

分 类 号：O643[理学—物理化学] O614.33[理学—化学]