Promotion of a Pd/Al2O3 close-coupled catalyst by Ni

doi:10.1016/S1872-2067(15)60850-6

Abstract

Abstract:

The influence of a nickel promoter on the catalytic behavior of a modified alumina supported Pd close-coupled catalyst was investigated. Doping with nickel improved the catalytic activity for the reactions of C₃H₈, especially over the aged catalyst. T₅₀ and T₉₀ of the aged Pd catalyst were decreased by 31 and 30 ℃, respectively. The single reaction results revealed that doping with Ni promoted the catalytic activity for the C₃H₈ + NO reaction. The fresh and aged catalysts were characterized by H₂-temperature-programmed reduction, CO chemisorption, high resolution transmission electron microscopy, and X-ray photoelectron spectroscopy, which revealed that the doping with Ni inhibited the sintering of active PdO_x species and the formation of undesired metallic Pd⁰, and led to improved reducibility of active PdO_x and increased the surface area of PdO_x species.

Key words: Close-coupled catalyst, Palladium, Nickel, Alumina, Propane

Ruimei Fang, Yajuan Cui, Zhonghua Shi, Maochu Gong, Yaoqiang Chen . Promotion of a Pd/Al₂O₃ close-coupled catalyst by Ni[J]. Chinese Journal of Catalysis, 2015, 36(7): 994-1000.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)60850-6

https://www.cjcatal.com/EN/Y2015/V36/I7/994

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Promotion of a Pd/Al₂O₃ close-coupled catalyst by Ni

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