Red-ox properties and phase composition of CeO2-ZrO2 and Y2O3-CeO2ZrO2 solid solutions

Authors
Markaryan, GL Ikryannikova, LN Muravieva, GP Turakulova, AO Kostyuk, BG Lunina, EV Lunin, VV Zhilinskaya, E Aboukais, A
Citation
Gl. Markaryan et al., Red-ox properties and phase composition of CeO2-ZrO2 and Y2O3-CeO2ZrO2 solid solutions, COLL SURF A, 151(3), 1999, pp. 435-447
Citations number
26
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN journal
09277757 → ACNP
Volume
151
Issue
3
Year of publication
1999
Pages
435 - 447
Database
ISI
SICI code
0927-7757(19990701)151:3<435:RPAPCO>2.0.ZU;2-X
Abstract
The crystalline structure and red-ox behaviour of CeO2-ZrO2 and Y2O3-CeO2-Z rO2 solid solutions were studied by means of XRD, TPR and EPR techniques. I t has been found that Y2O3 doping stabilizes a cubic structure at a low con tent of both Y2O3 (10.0 mol%) and CeO2 (7.0 mol%) and favours the reduction of the sample. The formation of O-2(-) anion radicals on the surface of Ce O2-ZrO2 and Y2O3-CeO2-ZrO2 in comparison with pure CeO2 was studied. A high er activity of O-2(-) in the reoxidation of the samples and towards CO was observed for yttria doped CeO2-ZrO2. (C) 1999 Elsevier Science B.V. All rig hts reserved.