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Electrocatalytic oxidation of methanol on carbon-nanotubes/graphite electrode modified with platinum and molybdenum oxide nanoparticles 被引量：1

Electrocatalytic oxidation of methanol on carbon-nanotubes/graphite electrode modified with platinum and molybdenum oxide nanoparticles
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摘要 Electrochemical codeposition and electrocatalytic properties of platinum and molybdenum oxide nanoparticles(Pt-MoOx) on carbon-nanotubes/graphite electrode for methanol oxidation were investigated.The micrograph and elemental composition of the resulting Pt-MoOx/CNTs/graphite electrode were characterized by scanning electron microscopy(SEM)and energy dispersive X-ray spectroscopy(EDS).The results show that the Pt-MoOx particles with the average size of about 50 nm are highly dispersed on the CNTs surface.The Pt-MoOx/CNTs/graphite electrode delivers excellent electrocatalytic properties for methanol oxidation.The highest mass activity(Am)reaches 264.8 A/g at the loading mass of 159.3μg/cm2.This may be attributed to the small particle size and high dispersion of Pt-MoOx catalysts deposited on the CNTs surface.The kinetic analysis from electrochemical impedance spectroscopy(EIS)reveals that the existed MoOx phase can improve the chemisorptive and catalytic properties for methanol oxidation. Electrochemical codeposition and electrocatalytic properties of platinum and molybdenum oxide nanoparticles （Pt-MoOx） on carbon-nanotubes/graphite electrode for methanol oxidation were investigated. The micrograph and elemental composition of the resulting Pt-MoOx/CNTs/graphite electrode were characterized by scanning electron microscopy（SEM） and energy dispersive X-ray spectroscopy（EDS）. The results show that the Pt-MOOx particles with the average size of about 50 nm are highly dispersed on the CNTs surface. The Pt-MoOx/CNTs/graphite electrode delivers excellent electrocatalytic properties for methanol oxidation. The highest mass activity（Am） reaches 264.8 A/g at the loading mass of 159.3 μg/cm^2. This may be attributed to the small particle size and high dispersion of Pt-MoOx catalysts deposited on the CNTs surface. The kinetic analysis from electrochemical impedance spectroscopy（EIS） reveals that the existed MoOx phase can improve the chemisorptive and catalytic properties for methanol oxidation.
作者 甘永平 黄辉 张文魁
机构地区 College of Chemical Engineering and Materials Science
出处 《中国有色金属学会会刊：英文版》 SCIE EI CAS CSCD 2007年第1期214-219,共6页 Transactions of Nonferrous Metals Society of China
基金 Project(50402020)supported by the National Natural Science Foundation of China
关键词 甲醇 氧化反应 碳管 燃料电池 单化学 methanol oxidation carbon nanotubes molybdenum oxides nanoparticles fuel cells
分类号 TB383.1 [一般工业技术—材料科学与工程]
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参考文献23

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同被引文献18

  • 1MA H C,XUE X Z,LIAO J H,LIU C P,XING W.Effect of borohydride as reducing agent on the structures and electrochemical properties of Pt/C catalyst. Applied Surface Science . 2006
  • 2DUBAU L,HAHN F,COUTANCEAU C,LEGER J M,LAMY C.On the structure effects of bimetallic PtRu electrocatalysts towards methanol oxidation. Journal of Electroanalytical Chemistry . 2003
  • 3CHU Y Y,WANG Z B,GU D M,YIN G P.Performance of Pt/C catalysts prepared by microwave-assisted polyol process for methanol electrooxidation. Journal of Power Sources . 2010
  • 4HUSSEIN A S,MURUGARAJ P,RIX C.Mechanism of formation and stabilization of platinum nanoparticles in aqueous solvents. Proceedings of SPIE the International Society for Optical Engineering . 2002
  • 5BAI Z Y,YANG L,ZHANG J S,LI L,HUA C G,Lü J,GUO Y M.High-efficiency carbon-supported platinum catalysts stabilized with sodium citrate for methanol oxidation. Journal of Power Sources . 2010
  • 6OZKAR S,FINKE R G.Nanocluster formation and stabilization fundamental studies:ranking commonly employed anionic stabilizers via the development,then application,of five comparative criteria. Journal of the American Chemical Society . 2002
  • 7QI J,YAN S Y,JIANG Q,LIU Y,SUN G Q.Improving the activity and stability of a Pt/C electrocatalyst for direct methanol fuel cells. Carbon . 2010
  • 8LIN C S,KHAN M R,LIN S D.The preparation of Pt nanoparticles by methanol and citrate. Journal of Colloid and Interface Science . 2006
  • 9HENGLEIN A,GIERSIG M.Reduction of Pt (II)by H2:Effects of citrate and NaOH and reaction mechanism. Journal of Physical Chemistry B . 2000
  • 10Pozio A,Francesco M D,Cemmi A,et al.Comparison of high surface Pt/C catalysts by cuclic voltammetry. Journal of Power Sources . 2002

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中国有色金属学会会刊：英文版
2007年 第1期

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