•  
  •  
 

Abstract

Multilayer films of polypyrrole-platinum electrode were fabricated by cyclic voltammetric technique.Electro-oxidation of methanol on this electrode was investigated with the aid of cyclic voltammetry and chronoamperometry.Results demonstrated that the multilayer of polypyrrole-platinum electrode behaved better electrocatalytic performance for electro-oxidaton of methanol and better poison resistant.Furthermore,with the increase of deposited platinum loadings,the rate controlling step on electro-oxidation reaction of methanol was changed from CO oxidation to sorption-desorption of hydrogen.

Keywords

methanol electro-oxidation, electrocatalysis, polypyrrole, cyclic voltammetry, electrodepositon

Publication Date

2011-02-28

Online Available Date

2011-02-28

Revised Date

2011-02-28

Received Date

2011-02-28

References

[1]Schultz T,Zhou S,Sundmacher K.Current status of andrecent developments in the direct methanol fuel cell[J].Chem Eng Technol,2001,24(12):1223-1233.


[2]Wasmus S,Kuver A.Methanol oxidation and direct me-thanol fuel cells:a selective review[J].J ElectroanalChem,1999,461(1/2):14-31.


[3]Jusys Z,Schmidt T J,Dubau L,et al.Activity of PtRu-MeOx(Me=W,Mo or V)catalysts towards methanol ox-idation and their characterization[J].J Power Sources,2002,105(2):297-304.


[4]Chu Yuan-yuan(初园园),Wu Bing(邬冰),Tang Ya-wen(唐亚文),et al.Electrocatalytic performance of Pt/C and Pt/WO3/C catalysts for methanol oxidation[J].Electrochemistry(电化学),2008,14(2):155-158.


[5]Zhou Zhen-hua(周振华),Zhou Wei-jiang(周卫江),Jiang Lu-hua(姜鲁华),et al.Mechanism of preparationprocess and characterization of highly dispersed Pt/Ccathode electrocatalyst for direct methanol fuel cell[J].Chin J Catal(催化学报),2004,25(1):65-69.


[6]Ficicioglu F,Kadirgan F.Microperoxidase-11-mediatedreduction of hemoproteins:electrocatalyzed reduction ofcytochrome c[J].J Electroanal Chem,1997,430(1/2):179-182.


[7]Wu G,Li L,Li J H,et al.Polyaniline-carbon compositefilm as supports of Pt and PtRu particles for methanolelectrooxidation[J].Carbon,2005,43(12):2579-2587.


[8]Niu L,Li Q,Wei F,et al.Electrocatalytic behavior of Pt-modified polyaniline electrode for methanol oxidation:Effect of Pt deposition modes[J].J Electroanal Chem,2005,578(2):331-337.


[9]Leone A,Marino W,Scharifker B R.Electrodepositionand electrochemical behavior of palladium particles atpolyaniline and polypyrrole films[J].J ElectrochemSoc,1992,139(2):438-443.


[10]Oliveira R T S,Santos M C,Marcussi B G,et al.Theuse of a metallic bilayer for the oxidation of small or-ganic molecules[J].J Electroanal Chem,2005,575(2):177-182.


[11]Chen A C,La Russa D J,Miller B.Effect of the iridiumoxide thin film on the electrochemical activity of plati-num nanoparticles[J].Langmuir,2004,20(22):9695-9702.


[12]Jüttnerz K,Mangold K M,Lange M.Preparation andproperties of composite polypyrrole/Pt catalyst systems[J].Russ J Electrochem,2004,40(3):317-325.


[13]Kulesza P J,Matczak M,Wolkiewicz A,et al.Electro-catalytic properties of conducting polymer based com-posite film containing dispersed platinum microparti-cles towards oxidation of methanol[J].ElectrochimActa,1999,44(12):2131-2137.

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.