Pd/CZ/AlO催化剂的制备、表征与三效催化性能

被引:10
作者
房师平
陈宏德
田群
姚青
韩芸
机构
[1] 中国科学院生态环境研究中心
[2] 中国科学院生态环境研究中心 北京
关键词
三效催化剂; 铈锆固溶体; 储氧能力; 金属与载体间强相互作用;
D O I
10.13227/j.hjkx.2005.05.003
中图分类号
X734 [公路];
学科分类号
083002 ;
摘要
以共浸渍法制得的氧化铝负载铈锆固溶体为载体,并浸渍贵金属Pd得到了Pd/CZ/Al2O3催化剂.实验结果表明,该催化剂在老化前后都表现出良好的三效催化活性,新鲜样品Pd/CZ/Al2O3活性与Pd/CZ相当,老化后样品前者优于后者.结合XRD,BET,TPR等表征手段,讨论了Pd/CZ/Al2O3的催化活性特别是高温老化后活性与其组成结构之间的内在关系,揭示了其老化后仍具有较高活性的主要原因在于保持了Pd与CZ/Al2O3复合载体之间的强相互作用(SMSI).
引用
收藏
页码:12 / 16
页数:5
相关论文
共 9 条
[1]  
The role of rare earth oxides as promoters and stabilizers in combustion catalysts. Sara Colussi,Carla de Leitenburg,et al. J. alloys. comp . 2004
[2]  
Influence of thermal sintering on the activity for CO-O2 and CO-O2-NO stoichiometric reactions over Pd/( Ce, Zr) Ox /Al2 O3 catalysts. Martinez-Arias A,Fernandez-Garcia M,et al. Applied Catalysis B Environmental . 2002
[3]  
Metalpromoter interface in Pd/(Ce, Zr)Ox /Al2 O3 catalysts: effect of thermal aging. Iglesias-Juez A,Martinez-Arias A,Fernandez-Garcia M. Journal of Catalysis . 2004
[4]  
An XRD and TEM investigation of the structure of alumina-supported ceria-zirconia. Yao M H,Baird R J,Kun F W,et al. Journal of Catalysis . 1997
[5]  
COMP[P]. CHUNG TAE YOUNG[KR];PARK KONG JU[KR].MX2025000662A,2025-04-02
[6]  
The sorption of hydrogen on palladium in a flow system. Geider Chen,Wen-tsae Chou,Chuin-tih Yeh. Applied Catalysis . 1983
[7]  
Stabilization of nanostructured Ce0. 2 Zr0. 8 O2 solid solution by impregnation on Al2 O3 : a suitable method for the production of themally stable oxygen storage/release promoters for three-way catalysts. Monte R Di,Fornasiero P,Kaspar J,et al. Chemical Communications . 2000
[8]  
Characterization of model automotive exhaust catalysts: Pd on Ceria and CeriaZirconia supports. Jen H-W,Graham G W,Chun W,et al. Catalysis Today . 1995
[9]  
Rh-loaded CeO2-ZrO2 solid solution as highly efficient oxygen exchangers: dependence of the reduction behavior and the OSC on the structural properties , J. Fornasiero P,Monte R,Rao G R,et al. Catalysis . 1995