Preparation of CeO2/ZrO2 modified by MgO: Roles of MgO for upgrading redox property

被引：3
|
作者：
Kakuta, Noriyoshi [1 ]
Kudo, Yosuke [1 ]
Eguchi, Tsuyoshi [1 ]
Ohkita, Hironobu [1 ]
Mizushima, Takanori [1 ]
Yamomoto, Takashi
Yasuda, Mitsunobu
机构：
[1] Toyohashi Univ Technol, Dept Mat Sci, Tempaku Ku, Toyohashi, Aichi 4418580, Japan
来源：
SCIENTIFIC BASES FOR THE PREPARATION OF HETEROGENEOUS CATALYSTS, PROCEEDINGS OF THE 9TH INTERNATIONAL SYMPOSIUM | 2006年 / 162卷
关键词：
D O I：
10.1016/S0167-2991(06)80980-8
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：
CeO2/ZrO2 modified by MgO has been prepared for the development of thermally stabilized CeO2-ZrO2 solid solution particles. A coprecipitated cerium and zirconium hydroxide coated with Mg species was effective as a precursor for preventing the sintering of CeO2/ZrO2 particles under the reduction at 1473 K and the oxidation at 773 K, where MgO was located in the grain boundary from the observation by a high resolution transmission electron microscope (HRTEM). The modified CeO2/ZrO2 showed a good redox performance, indicating that MgO, which does not react with neither CeO2 nor ZrO2, acts to prevent the deterioration of oxygen storage capacity(OSC) by the sintering as a reaction-barrier material at the grain boundary.
引用
收藏
页码：777 / 784
页数：8
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