CARBON-MONOXIDE ADSORPTION ON PD/CEO2 CATALYSTS - AN FTIR STUDY OF CARBONYL CLUSTERS

被引：5

作者：

BADRI, A ^{[1
]}

BINET, C ^{[1
]}

LAVALLEY, JCJ ^{[1
]}

机构：

[1] UNIV CAEN,ISMRA,CATALYSE & SPECTROCHIM LAB,CNRS,URA 414,F-14050 CAEN,FRANCE

来源：

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1995年 / 92卷 / 7-8期

关键词：

FTIR; PALLADIUM; CERIA; CARBONYL CLUSTERS;

D O I：

10.1051/jcp/1995921333

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Pd/Al2O3 and Pd/CeO2 catalysts were prepared by an impregnation procedure. The FT-IR study of the CO adsorption evidenced that palladium is in a more dispersed state when the carrier is reducible (ceria) than in the non-reducible case (alumina). On the ceria carrier palladium formed compact two-dimensional crystallites. The CO adsorption at room temperature on these crystallites was the more corrosive as the reduction temperature was low. Adsorbed carbonyl complexes were then observed with the following v(CO) wavenumbers : Pd(CO) (2010 cm(-1)), Pd2CO (1960 cm(-1)) and Pd-2(CO)(2) (1987, 1927 cm(-1)). They were only transient species when observed on the unreduced Pd/CeO2 catalyst.

引用

页码：1333 / 1343

页数：11