Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (04): 559-564.doi: 10.1016/S1872-1508(07)60037-0

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Preparation of High-alloying Pt-Ru/CMK-3 Catalysts in THF-H2O-EtOH Ternary Solution System

WU Wei; CAO Jie-Ming; CHEN Yu; LU Tian-Hong   

  1. Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China; Department of Chemistry, Nanjing Normal University, Nanjing 210097, P. R. China
  • Received:2006-09-18 Revised:2006-12-14 Published:2007-04-05
  • Contact: CAO Jie-Ming E-mail:jmcao@nuaa.edu.cn

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Abstract: The Pt-Ru particles of Pt-Ru/CMK-3 catalyst were found to possess high degree of alloying, small average size, and low relative crystallinity when the Pt-Ru/CMK-3 catalyst was prepared using the general chemical reduction method in the ternary solution system containing tetrahydrofuran (THF), H2O, and ethanol. The Pt-Ru/CMK-3 catalyst showed high electrocatalytic activity for methanol oxidation. It indicated that the alloying degree of Pt-Ru could significantly affect the electrocatalytic activity for methanol oxidation. The Pt-Ru/CMK-3 catalyst with high alloying degree can be obtained because THF and H2PtCl6 can forma complex leading to the reduction potentials of H2PtCl6 and RuCl3, which are close to each other in the aqueous solution with THF.

Key words: Direct methanol fuel cell, Pt-Ru/C catalyst, Tetrahydrofuran, Alloying degree