PROMOTION OF HYDROGEN UPTAKE IN CERIUM DIOXIDE - THE ROLE OF IRIDIUM

被引：38

作者：

TOURNAYAN, L

MARCILIO, NR

FRETY, R

机构：

[1] CNRS, INST RECH CATALYSE, 2 AV EINSTEIN, F-69626 VILLEURBANNE, FRANCE

[2] FDN CIENCIA & TECNOL, BR-90010 PORTO ALEGRE, RS, BRAZIL

来源：

APPLIED CATALYSIS | 1991年 / 78卷 / 01期

关键词：

CATALYST CHARACTERIZATION (TPD; TPR); CERIUM DIOXIDE; HYDROGEN; IRIDIUM; SPILLOVER;

D O I：

10.1016/0166-9834(91)80087-D

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 of hydrogen with ceria and iridium-ceria catalysts was studied at isothermal conditions and by temperature-programmed methods. Independent of the final temperature of reduction, hydrogen uptake during TPR was promoted by the presence of iridium in iridium-ceria catalysts. Partially reduced ceria was capable of storing hydrogen. The hydrogen storage ability increased with the reduction temperature of the ceria. It was also promoted by the presence of iridium. Various hypotheses, including the formation of Ir-Ce clusters at low temperature and hydrogen spillover, are considered to explain the observations.

引用

页码：31 / 43

页数：13

共 31 条

[1] INFLUENCE OF THE SUPPORT ON THE CATALYTIC PROPERTIES OF NICKEL CERIA IN CARBON-MONOXIDE AND BENZENE HYDROGENATION [J].