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Citation: GUO Jia-Xiu, YUAN Shu-Hua, NG Mao-Chu, ZHANG Lei, WU Dong-Dong, ZHAO Ming, CHEN Yao-Qiang. Influence of Ce_0.35Zr_0.55La_0.10O_1.95 Solid Solution on the Performance of Pt-Rh Three-way Catalysts[J]. Acta Physico-Chimica Sinica, ;2007, 23(01): 73-78. doi: 10.1016/S1872-1508(07)60007-2 shu

Influence of Ce_0.35Zr_0.55La_0.10O_1.95 Solid Solution on the Performance of Pt-Rh Three-way Catalysts

1.
College of Chemistry, Sichuan University, Chengdu 610064, P. R. China

Received Date: 18 July 2006
Available Online: 8 January 2007

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 ℃ for 5 h. Furthermore, after being aged at 1000 ℃ for 5 h, Ce0.35Zr0.55La0.10O1.95 still maintained a stable cubic structure and a specific surface area of 47.25 m2•g−1. The results of H2-TPR and O2-TPO indicated that Ce0.35Zr0.55La0.10O1.95 had od redox properties. The catalyst containing Ce0.35Zr0.55La0.10O1.95 possessed fairly wide range of three-way working-windows, od low temperature light-off properties, and better ability of water-gas shift. Being hydrothermal aged at 1000 ℃, the catalyst containing Ce0.35Zr0.55La0.10O1.95 still showed od 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.
- Low precious metal,
- Three-way catalyst,
- Temperature-programmed technique,
- Redoxidation
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Ce0.35Zr0.55La0.10O1.95 Solid Solution on the Performance of Pt-Rh Three-way Catalysts

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通讯作者: 陈斌, bchen63@163.com

Influence of Ce_0.35Zr_0.55La_0.10O_1.95 Solid Solution on the Performance of Pt-Rh Three-way Catalysts