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Citation: HONG Chun-yan, LI Min, LIU Jia-xiang. Preparation of Pt/Au/Fe3O4 nanocomposites and their electrocatalytic activities in methanol oxidation[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(9): 1108-1114. shu

Preparation of Pt/Au/Fe3O4 nanocomposites and their electrocatalytic activities in methanol oxidation

  • 1.

    College of Materials Science and Engineering, the Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China

  • Corresponding author: LIU Jia-xiang, 
  • Received Date: 23 December 2012
    Available Online: 11 April 2013

  • Pt/Au/Fe3O4 nanocomposites were prepared by the continuous reduction method, through loading Pt and Au on the surface of nano Fe3O4. The Pt/Au/Fe3O4 nanocomposites were characterized by UV-vis spectra, transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectrometer (XPS); their electrocatalytic activities in methanol oxidation were investigated. The results indicated that Au and Pt are uniformly deposited on Fe3O4 surface. The cyclic voltammograms of Pt/Au/Fe3O4 suggests that the best catalytic performance is achieved when the amount of H2PtCl6 added is 8 mL. Current peak ip is proportional to the square root of scanning speed (v1/2) and the catalytic methanol oxidation process is under the control of diffusion. The Pt/Au/Fe3O4 nanocomposites remain high active during the measurements of cyclic voltammograms for 201 times, suggesting that Pt/Au/Fe3O4 is a kind of anode catalyst materials with high chemical activity and stability.
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