The structural effect of CeO2 and La2O3 modified Pd/γAl2O3 catalysts

被引：2
|
作者：
Yang, C
Dong, QN
Zhang, J
Ren, J
Sun, YH [1 ]
Xie, YN
Hu, TD
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, State Key Lab Synchrotron Radiat, Beijing 100039, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2002年 / 18卷 / 02期
关键词：
La2O3; CeO2; supported Pd; structure effect; methanol decomposition;
D O I：
10.3866/PKU.WHXB20020216
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of Pd/gamma-Al2O3 catalysts modified by CeO2 and La2O3 were prepared by impregnation method with different La2O3, CeO2 dope manners. Methanol decomposition was used as a probe reaction. The structure of the catalysts was characterized by means of BET, XRD, XPS and FTIR. The results showed that a La2O3-CeO2 solid solution was facile to form by La3+ dissolution into CeO2 lattice. The dimension of CeO2 particles decreased, while the dispersion and crystal plane of Pd and the Pd-CeO2 interaction varied with La2O3, CeO2 dope manners. High dispersion of Pd and a strong interaction between Pd and CeO2 were observed on a La2O3 and CeO2 modified Pd/Al2O3 catalyst with La2O3-CeO2 successive dope manner, which resulted in high activity for methanol decomposition.
引用
收藏
页码：170 / 174
页数：5
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