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

被引：82

作者：

Markaryan, GL

Ikryannikova, LN

Muravieva, GP

Turakulova, AO

Kostyuk, BG

Lunina, EV

Lunin, VV

Zhilinskaya, E

Aboukais, A

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia

[2] Univ Littoral, MREID, Lab Catalyse & Environm, F-59140 Dunkerque, France

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1999年 / 151卷 / 03期

关键词：

CrO2-ZrO2; CO oxidation; crystalline structure; O-2(-) formation and reactivity; red-ox behaviour; solid solutions; TPR; Y2O3-CeO2-ZrO2;

D O I：

10.1016/S0927-7757(98)00574-3

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 crystalline structure and red-ox behaviour of CeO2-ZrO2 and Y2O3-CeO2-ZrO2 solid solutions were studied by means of XRD, TPR and EPR techniques. It has been found that Y2O3 doping stabilizes a cubic structure at a low content 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 CeO2-ZrO2 and Y2O3-CeO2-ZrO2 in comparison with pure CeO2 was studied. A higher 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 rights reserved.

引用

页码：435 / 447

页数：13

共 25 条

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