Redox properties and catalytic behavior of praseodymium-modified (Ce-Zr)O2 solid solutions in three-way catalysts

被引：43

作者：

Wang, WD ^{[1
]}

Lin, PY ^{[1
]}

Fu, YL ^{[1
]}

Cao, CY ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China

来源：

CATALYSIS LETTERS | 2002年 / 82卷 / 1-2期

关键词：

three-way catalyst; praseodymium; (Ce-Zr)O-2 solid solution; redox properties; sol-gel method;

D O I：

10.1023/A:1020575604843

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 three-way catalyst promoters (Ce-Zr)O-2, (Pr-Ce-Zr)O-2 and (Pr-Zr)O-2 were prepared by the sol-gel method. The reduction/oxidation behavior of these mixed oxides was compared. It is shown that the formation of (Pr-Zr)O-2 cubic solid solution at high temperature up to 800degreesC makes it more reducible, and that the ternary solid solution that formed in (Pr-Ce-Zr)O-2 mixed oxides plays an important role in the reduction process. The catalytic performance tests reveal that the introduction of a small amount of praseodymium (Ce-Zr)O-2 favors the light-off temperature of C3H6 and NO and the effectiveness for NO conversion at the lean region.

引用

页码：19 / 27

页数：9

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