INCORPORATION OF LA3+ INTO A PT/CEO2/AL2O3 CATALYST

被引：52

作者：

USMEN, RK

GRAHAM, GW

WATKINS, WLH

MCCABE, RW

机构：

[1] Ford Research Laboratory, Ford Motor Company, Dearborn, 48121-2053, MI

来源：

CATALYSIS LETTERS | 1995年 / 30卷 / 1-4期

关键词：

LANTHANA; ALUMINA; CERIA; PT; 3-WAY CATALYST; OXYGEN STORAGE; X-RAY DIFFRACTION; CO CHEMISORPTION; TEMPERATURE-PROGRAMMED REDUCTION;

D O I：

10.1007/BF00813672

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：

The effects of La3+ incorporation into a Pt/CeO2/Al2O3 catalyst were investigated by a combination of activity, temperature-programmed reduction (TPR), oxygen storage capacity (OSC), noble-metal surface area, and X-ray diffraction (XRD) measurements. Incorporation of La3+ ions into the Al2O3, before CeO2 is added, promoted higher Pt and CeO2 dispersions. The oxygen storage capacity was also higher in the presence of La3+. This is attributed to a combination of Pt and CeO2 particle-size effects and possible blockage of the reaction between Al2O3 and CeO2. The XRD data show that La3+ forms LaAlO3 with Al2O3 and prevents alpha-Al2O3 formation after various heat treatments.

引用

页码：53 / 63

页数：11

共 19 条

[1] CHARACTERIZATION OF LANTHANIDE OXIDE-PROMOTED RHODIUM ALUMINA CATALYSTS [J].