Cu/Mo/CeO_2-ZrO_2催化剂的制备及其三效催化性能  

Preparation and Performance of Cu/Mo/CeO_2-ZrO_2 Catalysts

作　　者：郭锡坤[1] 章从根[1] 李式伟[1] 陈耀文[2] 

机构地区：[1]汕头大学理学院化学系,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）》2011年第3期49-56,62,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：以不同沉淀剂制备的CeO2-ZrO2复合氧化物为载体,采用等体积浸渍法制备了Cu/Mo/CeO2-ZrO2催化剂.研究结果表明,当Ce︰Zr的摩尔比为0.65︰0.35,Mo添加量为6%,Cu负载量为5%时,制得的Cu/Mo/CeO2-ZrO2对CO、C3H6和NO的转化具有更好的催化活性,在该催化剂上,CO、C3H6和NO的T50分别为103℃、248℃和244℃,T90分别为189℃、450℃和321℃.Mo的添加能够使催化剂形成稳定的立方晶相固溶体结构,并且使其颗粒更加细化,从而有利于Cu物种高度分散在催化剂表面,提高了催化剂的性能.The CeO2-ZrO2 composite support was prepared by different precipitators as the earrier. The Cu/Mo/CeO2-ZrO2 catalyst was prepared by incipient wetness impregnalion with them. The resuhs showed, the Cu/Mo/CeO2-ZrO2 catalyst with Ce：Zr molar ratio of 0.65：0.35, the content Mo of 6% and the content Cu of 5% showed the better catalytic performance. The light-off temperatures for CO, C3Ht, and NO were 103 ℃, 248 ℃ and 244 ℃ respectively. CO could be completely converted above 189 ℃, C3H6 could be completely converted above 450 ℃, and NO could be completely converted above 321 ℃. Mo was added to torm a stable cubic structure of the solid solution, and il makes the catalyst particles smaller. Highly dispersed CuO partieles were formed on the surface of catalyst aml improved the catalytic activity.

关 键 词：CU MO C002 Z102 共沉淀法 

分 类 号：O643[理学—物理化学]