SURFACE-AREA STABILITY OF LANTHANUM-DOPED CERIA

被引：15

作者：

PIJOLAT, M ^{[1
]}

PRIN, M ^{[1
]}

SOUSTELLE, M ^{[1
]}

TOURET, O ^{[1
]}

NORTIER, P ^{[1
]}

机构：

[1] RHONE POULENC RECH, CRA, F-93308 AUBERVILLIERS, FRANCE

来源：

SOLID STATE IONICS | 1993年 / 63-5卷

关键词：

D O I：

10.1016/0167-2738(93)90196-A

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：

High surface area ceria was doped with lanthanum ions and calcined at 900 K under various partial pressures of oxygen and water vapour. The kinetic rates of crystallite size increase were observed to vary as P(O2)-1/6. By addition of 0.5 and 1% of lanthanum ions, the rates were lowered, and then significantly decreased for 10% (cat.). A model of this process involved association between lanthanum ions and oxygen vacancies in order to explain the better stability of doped ceria.

引用

页码：781 / 785

页数：5

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