Citation: YU Jian-Yan, SONG Shao-Fei, YE Su-Fang, XIAO Qiang, ZHONG Yi-Jun, YE Xiang-Rong, ZHU Wei-Dong. Selective Hydrogenation of Cinnamaldehyde on Magnetically Recyclable Pt/Fe3O4-MCNT Catalysts[J]. Chinese Journal of Inorganic Chemistry, ;2014, (2): 271-276. doi: 10.11862/CJIC.2014.025
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A multi-step method was adopted to prepare a magnetic Pt/Fe3O4-MCNT catalyst by loading as-prepared Fe3O4 and Pt nanoparticles onto multi-walled carbon nanotubes (MCNT). The structure and magnetic properties of the prepared Pt/Fe3O4-MCNT catalyst were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), superconducting quantum interference device (SQUID), and thermogravimetry-differential thermal analysis (TG-DTA). The results reveal that the as-prepared Fe3O4 and Pt nanoparticles are well dispersed on the MCNT. Additionally, the magnetic measurements show that both fresh and recycled magnetic Pt/Fe3O4-MCNT catalysts display excellent superparamagnetic properties at room temperature. The selective hydrogenation of cinnamaldehyde to cinnamyl alcohol was performed on the magnetic Pt/Fe3O4-MCNT catalyst, showing a superior activity in the hydrogenation of the C=O bond. A selectivity of 96% to cinnamyl alcohol can be achieved at a cinnamaldehyde conversion of about 50%. The reason of the good selectivity probably ascribes to the high dispersion of the uniformed Pt particles on the MCNT. Additionally, the catalyst can be easily recovered from the reaction medium under the external magnetic field and maintain its catalytic properties after used for several recycles.
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