负载型纳米Pd-M(Ag,Cu)催化剂的制备与催化性能

doi:10.3969/j.issn.1001-4381.2013.05.011

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Abstract Pd-M(Ag,Cu) bimetallic catalysts can be easily prepared via in situ reduction of the corresponding Pd²⁺, Ag⁺ and Cu²⁺ that the coordination interaction took place between the metal ions and amide of poly(N,N-diethylacrylamide) (PDEAm) using as-prepared PDEAm grafted poly(acrylonitrile/styrene) (PDEAm-g-PAN/PSt) microspheres as carrier. The ultrafine dispersed Pd-M (Ag,Cu) bimetallic nanoparticles were loaded on the surfaces of the PDEAm-g-PAN/PSt microspheres. The Pd-M bimetallic catalysts were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray spectrum (EDS) and thermo-gravimetric analysis (TGA). The results show that PDEAm-g-PAN/PSt microspheres have obvious flower-shape morphology,and Pd-M(Ag,Cu) nanoparticles are formed on the surface of polymer microspheres with the average particle size in about 10nm,and the catalytic efficiency of the Pd-M (Ag,Cu) is evaluated in hydrogenation reactions of 1-octylene. The catalytic efficiency of Pd-M bimetallic catalysts is higher than that of Pd/C, and the efficiency order is Pd-Cu>Pd-Ag>Pd/C.

Key words： polymeric microsphere poly(N,N-diethylacrylamide) bimetallic catalyst hydrogenation

Received: 10 January 2012 Published: 20 May 2013

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http://jme.biam.ac.cn/EN/10.3969/j.issn.1001-4381.2013.05.011 OR http://jme.biam.ac.cn/EN/Y2013/V0/I5/53

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