PREPARATION AND CHARACTERIZATION OF PDO-MOO3/GAMMA-AL2O3 CATALYSTS

被引：41

作者：

HALASZ, I

BRENNER, A

SHELEF, M

NG, KYS

机构：

[1] WAYNE STATE UNIV,DEPT CHEM,DETROIT,MI 48202

[2] FORD MOTOR CO,DEARBORN,MI 48121

[3] WAYNE STATE UNIV,DEPT CHEM ENGN,DETROIT,MI 48202

[4] HUNGARIAN ACAD SCI,CENT RES INST CHEM,H-1361 BUDAPEST 5,HUNGARY

来源：

APPLIED CATALYSIS A-GENERAL | 1992年 / 82卷 / 01期

关键词：

CATALYST CHARACTERIZATION (TPR; XRD); CATALYST PREPARATION ((CO-)ADSORPTION); MOLYBDENUM ALUMINA; NOX; PALLADIUM ALUMINA; TEMPERATURE-PROGRAMMED REDUCTION;

D O I：

10.1016/0926-860X(92)80005-W

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：

Three different procedures have been compared for the preparation of PdO-MoO3/gamma-Al2O3 catalysts for the purpose of achieving close proximity of the palladium and molybdenum oxides. The methods are: 1. adsorption of [PdCl2 (OH)2]2- anions on MoO3/gamma-Al2O3;2. coadsorption of [Pd(NH3)4]2+ cat-ions and MoO4(2-) anions on gamma-Al2O3;3. adsorption of Mo(CO)6 on PdO/gamma-Al2O3. Twenty catalysts were prepared and characterized by temperature-programmed reduction and X-ray powder diffraction. In general, the first method resulted in large, weakly bounded PdO particles in poor contact with the molybdenum oxide, whereas the other two methods resulted in a strong interaction between finely divided palladium and molybdenum oxides.

引用

页码：51 / 63

页数：13

共 64 条

[1] PALLADIUM TUNGSTEN CATALYSTS FOR AUTOMOTIVE EXHAUST TREATMENT [J].