Preparation of Ce-Zr-La-Al2O3 and Supported Single Palladium Three-Way Catalysts

Abstract

Abstract: Ce-Zr-La-Al2O3 (CZLA) was prepared by co-precipitation and incipient wet impregnation methods and characterized by N2 adsorption andX-raydiffraction. 2%Pd/CZLA catalysts were prepared and studied by temperature-programmed reduction and activity tests. The CZLA supports prepared by the two methods showed good structural, textural, and oxygen storage properties, and the CZLA prepared by co-precipitation was more resistant to aging. The single Pd catalysts showed low light-off temperature and high three-way catalytic activity, especially the excellent NO conversion and aging resistance.

Key words: cerium, zirconium, lanthanum, alumina, palladium, three-way catalyst, reation temperature, aging resistance

CAI Li;ZHAO Ming;PI Zhan;GONG Maochu;CHEN Yaoqiang*. Preparation of Ce-Zr-La-Al2O3 and Supported Single Palladium Three-Way Catalysts[J]. Chinese Journal of Catalysis, 2008, 29(2): 108-112.

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Preparation of Ce-Zr-La-Al2O3 and Supported Single Palladium Three-Way Catalysts

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