Preperation of High Performance Ce0.5Zr0.5O2 Rare Earth Oxygen Storage Material and Its Supported Pd-Only Three-Way Catalyst

doi:10.3724/SP.J.1088.2012.10933

Abstract

Abstract: A series of Ce_0.5Zr_0.5O₂ oxygen storage material samples were prepared by co-precipitation using ammonium carbonate as precipitant. The effect of the concentration of the salt solution on the performance of the target materials and its supported Pd-only catalyst was investigated. The samples were characterized by N₂ adsorption, X-ray diffraction, oxygen storage capacity, and temperature-programmed reduction. The results showed that the prepared material exhibited high thermal stability and perfect redox properties. When the concentration of the salt solution was 0.3 mol/L, the obtained material presented the best textural properties with a surface area of 53.0 m²/g and pore volume of 0.17 cm³/g after calcination at 1000 ^oC for 5 h. The corresponding catalyst exhibited higher catalytic activity with relative low light-off and full conversion temperature, showing potential application in automotive catalysts.

Key words: cerium-zirconium solid solution, co-precipitation, ammonium carbonate, high thermal stability, redox property, palladium, three-way cata-lyst

YAN Chao-Yang, LAN Li, CHEN Shan-Hu, ZHAO Ming, GONG Mao-Chu, CHEN Yao-Qiang-*. Preperation of High Performance Ce_0.5Zr_0.5O₂ Rare Earth Oxygen Storage Material and Its Supported Pd-Only Three-Way Catalyst[J]. Chinese Journal of Catalysis, 2012, 33(2): 336-341.

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https://www.cjcatal.com/EN/Y2012/V33/I2/336

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Preperation of High Performance Ce_0.5Zr_0.5O₂ Rare Earth Oxygen Storage Material and Its Supported Pd-Only Three-Way Catalyst

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