Coordinatively unsaturated cerium ions at the surface of CeO2/SiO2

被引：0
|
作者：
Markaryan, GL
Lunina, EV
机构：
来源：
KINETICS AND CATALYSIS | 1996年 / 37卷 / 01期
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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 state of cerium ions at the surface of CeO2 and CeO2/SiO2 is studied by the method of the paramagnetic probe. The Lewis acidity of this system is shown to be determined by coordinatively unsaturated Ce4+ ions. It is found that these ions are not uniform at the surface of CeO2/SiO2: at least two types of such sites exist, which differ in electron-acceptor properties. The concentrations of the centers of both types are measured, The matrix is shown to influence the concentration and electron-acceptor properties of the coordinatively unsaturated Ce4+ ions.
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页码：133 / 139
页数：7
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