铜基铈铁钇复合氧化物的制备及催化性能研究  

Preparation of Cu-based Ce-Fe-Y Composite Oxide Catalyst and Its Catalytic Performance

作　　者：郭锡坤[1] 刘迎春[1] 陈耀文[2] 

机构地区：[1]汕头大学理学院,广东汕头515063 [2]汕头大学中心实验室,广东汕头515063

出　　处：《汕头大学学报（自然科学版）》2013年第2期30-38,共9页Journal of Shantou University：Natural Science Edition

基　　金：广东省科技计划项目(2006B36702003);国家自然科学基金(60971075)

摘　　要：采用反向滴定共沉淀法制备铈铁钇复合氧化物(Ce1-xFexYzO2-λ)载体,然后用等体积浸渍法负载活性组分Cu,研制铜基铈铁钇复合氧化物(Cuy/Ce1-xFexYzO2-λ)催化剂.实验结果表明:Ce:Fe:Y摩尔比为0.9:0.1:0.05、Cu负载量为3%时,制得的Cu3%/Ce0.9Fe0.1Y0.05O2-λ催化剂对CO、NO和C3H6的转化反应具有良好的催化活性,在该催化剂上CO、NO和C3H6的起燃温度(T50)分别为100℃、234℃和258℃,完全转化温度(T90)分别为183℃、318℃和350℃;由于Fe和Y能与Ce氧化物形成稳定的立方晶固溶体,载体表面不出现Fe、Y或Cu物种晶相聚集的现象,Ce与Fe和Y之间的良好协同效应有利于提高催化活性和热稳定性,因此Cu3%/Ce0.9Fe0.1Y0.05O2-λ催化剂性能良好.The Ce1-xFexYzO2-λ composite oxide supporter was prepared by reverse titration co-precipitation method, and then the Cuy/Ce1- xFexYzO2-λ~ catalyst was prepared by equivalent-volume impregnation method to load active component Cu on the supporter. The experimental results indicated that Cu3%/Ce0.9Fe0.1Y0.05O2-λ catalyst showed favourable catalytic activity on the conversion reaction of CO, NO and C3H6 when the molar ratio of Ce ： Fe ： Y was 0.9 ： 0.1 ： 0.05 and the content of Cu was 3%, the light-off temperatures （T50） for CO, NO and C3H6 were 100℃, 234℃ and 258℃, and the complete conversion temperature （T90） were 183℃, 318℃ and 350℃ respectively. Because Fe and Y could form stable cubic structure of the solid solution with Ce oxide, and the clustering phenomena of Fe, Y or Cu species crystalline phase on the surface of the support was not existed, the good synergistic effects between Ce, Fe and Y could improve the catalytic activity and thermal stability effectively, consequently the Cuy/Ce1-xFexYzO2-λ catalyst exhibited favourable performance.

关 键 词：Cu CE Fe Y 共沉淀 

分 类 号：O643[理学—物理化学]