Effects of Different Preparation Methods on the Properties of CeO2-ZrO2-Al2O3

doi:10.3724/SP.J.1077.2011.00813

Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (8): 813-818.DOI: 10.3724/SP.J.1077.2011.00813

• Research Paper • Previous Articles Next Articles

Effects of Different Preparation Methods on the Properties of CeO₂-ZrO₂-Al₂O₃

JIAO Yi, TANG Shi-Yun, WANG Jian-Li, ZHU Qing-Chao, CHEN Yao-Qiang, GONG Mao-Chu

(College of Chemistry, Sichuan University, Chengdu 610064, China)

Received:2010-10-17 Revised:2010-12-07 Published:2011-08-20 Online:2011-07-14
Supported by:
National Natural Science Foundation of China(20773090)

Abstract

Abstract: Oxygen storage material of Ce_0.5Zr_0.5O₂(12wt%)-Al₂O₃(CZA) was prepared by three different methods of coprecipitation, peptization and peptization-coprecipitation. The structure and physicochemical properties of materials were characterized by X-ray diffraction (XRD), N₂adsorption-desorption, oxygen pulse adsorption (OSC), H2-temperature programmed reduction (TPR) and O₂-programmed desorption (O₂-TPD). The XRD results demonstrate that all the samples have CeO₂-ZrO₂cubic fluorite and γ-Al₂O₃after calcined at 1000℃. The results according to N₂ adsorption-desorption show that the sample prepared by peptization-coprecipitation has higher specific surface area (146.2 m²/g), larger pore volume (0.5 mL/g), and the best distribution of the pore size. The results from OSC and H₂-TPR indicate that the sample prepared by peptization-coprecipitation has the best performance of oxygen storage and reduction capacity. At the same time, the influence of different methods on the properties of samples after calcined at 1100℃ are discussed.

Key words: CeO₂-ZrO₂-Al₂O₃, structure properties, oxygen storage capacity, redox property

CLC Number:

TB33
O643

JIAO Yi, TANG Shi-Yun, WANG Jian-Li, ZHU Qing-Chao, CHEN Yao-Qiang, GONG Mao-Chu. Effects of Different Preparation Methods on the Properties of CeO₂-ZrO₂-Al₂O₃[J]. Journal of Inorganic Materials, 2011, 26(8): 813-818.

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Effects of Different Preparation Methods on the Properties of CeO₂-ZrO₂-Al₂O₃

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