Influence of Ce0.35Zr0.55La0.10O1.95 solid solution on the performance of Pt-Rh three-way catalysts

被引：15

作者：

Guo Jia-Xiu ^{[1
]}

Yuan Shu-Hua ^{[1
]}

Gong Mao-Chu ^{[1
]}

Zhang Lei ^{[1
]}

Wu Dong-Dong ^{[1
]}

Zhao Ming ^{[1
]}

Chen Yao-Qiang ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2007年 / 23卷 / 01期

基金：

中国国家自然科学基金;

关键词：

low precious metal; three-way catalyst; temperature-programmed technique; redoxidation;

D O I：

10.1016/S1872-1508(07)60007-2

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 [物理化学]; 081704 [应用化学];

摘要：

Ce0.35Zr0.55La0.10O1.95 solid solution was prepared by coprecipitation technique and characterized by specific surface area measurements (BET), X-ray diffraction (XRD), and temperature-programmed (TP) technique. Ce0.35Zr0.55La0.10O1.95 was used to prepare low Pt-Rh three-way catalyst (TWC) and its influence on the performance of TWC was investigated. The results showed that Ce0.35Zr0.55La0.10O1.95 had a cubic structure similar to Ce0.50Zr0.50O2 and high specific area after calcined at 600 degrees C for 5 h. Furthermore, after being aged at 1000 degrees C for 5 h, Ce0.35Zr0.55La0.10O1.95 still maintained a stable cubic structure and a specific surface area of 47.25 m(2).g(-1). The results of H-2-TPR and O-2-TPO indicated that Ce0.35Zr0.55La0.10O1.95 had good redox properties. The catalyst containing Ce0.35Zr0.55La.10O1.95 possessed fairly wide range of three-way working-windows, good low temperature light-off properties, and better ability of water-gas shift. Being hydrothermal aged at 1000 degrees C, the catalyst containing Ce0.35Zr0.55La0.10O1.95 still showed good catalytic activity in comparison with Ce0.50Zr0.50O2 TWC, which indicated that Ce0.35Zr0.55La0.10O1.95 improved the anti-aging properties of the catalyst.

引用

页码：73 / 78

页数：6

共 24 条

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