UNSPECIFIED (2003) Catalytic studies on ceria lanthana solid solutions II. Oxidation of carbon monoxide. JOURNAL OF CATALYSIS, 219 (2). pp. 295-304. ISSN 0021-9517

Full text not available from this repository.

Abstract

The catalytic combustion of carbon monoxide over ceria, lanthana, and their mixed oxides has been studied under reaction conditions free from heat and mass transfer limitations. The bulk structures, surface compositions, and surface areas of the catalysts were determined by XRD. XPS. and BET methods, respectively. Doping either ceria or lanthana with low levels of the other oxide retards the reaction. The reaction order on carbon monoxide is almost first-order over ceria, but over the lanthana-containing catalysts it changes from positive to negative with increasing partial pressure. With all catalysts, the rate tends to zeroth order on oxygen with increasing partial pressure. An extended study was made of the major solid solution, lanthana-in-ceria, which operated near-threshold temperatures is poisoned by lanthana. The active centres are ensembles of cerium atoms, the size being lowered by lanthanum. The retardation is discussed in terms of interactions between cerium ensembles and anionic vacancies. (C) 2003 Published by Elsevier Inc.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry T Technology > TP Chemical technology
Journal or Publication Title:	JOURNAL OF CATALYSIS
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
ISSN:	0021-9517
Date:	25 October 2003
Volume:	219
Number:	2
Number of Pages:	10
Page Range:	pp. 295-304
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9253

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item