The CO2-CeO2 interaction and its role in the CeO2 reactivity

被引：71

作者：

Appel, LG

Eon, JG

Schmal, M

机构：

[1] Univ Fed Rio de Janeiro, COPPE, PEQ, NUCAT, BR-21945 Rio De Janeiro, Brazil

[2] Inst Nacl Tecnol, BR-20081810 Rio De Janeiro, Brazil

[3] UFRJ, Ctr Technol, Inst Quim, Rio De Janeiro, Brazil

[4] UFRJ, Escola Quim, Rio De Janeiro, Brazil

来源：

CATALYSIS LETTERS | 1998年 / 56卷 / 04期

关键词：

cerium; gas carbonic; propane; oxidation;

D O I：

10.1023/A:1019098121432

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 interaction between CO2 and CeO2 and its role in the surface reactivity of alumina-supported cerium oxide has been studied by programmed thermodesorption (TPD) of CO2 and FTIR spectroscopy. The performance of Ce/Al2O3 systems was then analyzed for the propane oxidation in presence of CO2. The results have shown that the catalytic activity decreased when carbonate species are formed at the surface of CeO2. This behavior was attributed to the presence of CO2 from three different sources: contamination before use, during the handling of the samples, contamination proceeding from the reactants and from CO2 produced by the reaction itself.

引用

页码：199 / 202

页数：4

共 16 条

[1]

Appel LG, 1997, PHYS STATUS SOLIDI A, V163, P107, DOI 10.1002/1521-396X(199709)163:1<107::AID-PSSA107>3.0.CO

[2]

2-4

[3] IR STUDY OF CARBON-DIOXIDE AND CARBON-MONOXIDE ADSORPTION ONTO CERIA - EFFECT OF THE REDUCTION STATE OF CERIA [J].