Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (03): 711-716.doi: 10.3866/PKU.WHXB20110327

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Pt-Ni Catalyst Supported on CMK-5 for the Electrochemical Oxidation of Methanol

DING Xiao-Chun, CHEN Xiu, ZHOU Jian-Hua, WANG Tao, SUN Dun, HE Jian-Ping   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
  • Received:2010-10-27 Revised:2011-01-10 Published:2011-03-03
  • Contact: HE Jian-Ping E-mail:jianph@nuaa.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50871053).

Abstract:

Pt-Ni alloy catalysts with different atomic ratios were deposited on CMK-5 (carbon replicated from SBA-15 silica) by NaBH4 reduction. X-ray diffraction (XRD) suggests alloy formation between Pt and Ni. X-ray photoelectron spectroscopy (XPS) shows that Pt-Ni/CMK-5 (5:1) has more detectable oxidized Ni. More metallic Pt is present on Pt-Ni/CMK-5 (5:1) (atomic ratio) than on Pt/CMK-5. Oxidized Ni species, such as NiO, Ni(OH)2, and NiOOH, favor the adsorption of methanol and the dissociation of methanol from the surface of Pt. Cyclic voltammetry shows that Pt-Ni/CMK-5 (5:1) has the highest specific activity among the as-made catalysts and its electrochemical active area is 63.9 m2·g-1. It has more resistance to CO poisoning than Pt/CMK-5.

Key words: CMK-5, Pt/CMK-5 catalyst, Pt-Ni/CMK-5 catalyst, Methanol, Electrooxidation

MSC2000: 

  • O646