Pt-Rh-Pd/CeO_2-La_2O_3/Al_2O_3催化剂的制备与表征  

Preparation and Characterization of Pt-Rh-Pd/CeO_2-La_2O_3/Al_2O_3 Catalyst

作　　者：旷成秀[1] 刘康强[1] 乔波[1] 李凤仪[2] 

机构地区：[1]九江学院化学与环境学院,江西九江332005 [2]南昌大学应用化学研究所,南昌330471

出　　处：《贵金属》2014年第3期20-23,共4页Precious Metals

摘　　要：用共浸渍法制得了Pt-Rh-Pd/CeO2-La2O3/Al2O3催化剂,采用X射线衍射(XRD)对催化剂进行表征,使用配气测试系统对催化剂的活性进行评价。正交试验结果表明,对CO的氧化,选择最佳催化剂的配比为Pt-Rh-Pd 0.1%,CeO2 5%,La2O3 4%,对NO的还原,其最佳配比为Pt-Rh-Pd 0.1%,CeO2 4%,La2O3 4%。稀土氧化物(La2O3、CeO2)作为助剂,能改善Pt-Rh-Pd/CeO2-La2O3/Al2O3催化剂的催化性能,但不能起主要作用。The Pt-Rh-Pd/CeO2-La2O3/A12O3 catalysts were prepared with method of co-impregnation, and characterized by X-ray diffraction （XRD）. Its catalytic activities were evaluated by gas mixing test system. The results of orthogonal experiments showed that the best catalyst formula is Pt-Rh-Pd 0.1%, CeO25%, La2O3 4% to the oxidation of carbon monoxide, while to the reduction of NO, the best catalyst formula is Pt-Rh-Pd 0.1%, CeO2 4%, La2O3 4%. Rare earth oxides （La2O3, CeO2） as co-catalyst, only can improve catalytic ability of Pt-Rh-Pd/CeO2-La2O3/A12O3, but do not play critical roles.

关 键 词：金属材料 贵金属 稀土 汽车尾气净化催化剂 

分 类 号：O643.361[理学—物理化学]