Platinum particles dispersed polyaniline-modified electrodes containing sulfonated polyelectrolyte for methanol oxidation

Feng Jiin Liu, Li Ming Huang, Ten Chin Wen, Ching Fan Li, Shu Ling Huang, A. Gopalan

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

The film of polyaniline nanowires (PANI (NW)) was deposited onto the surface of stainless steel electrode through galvanostatic polymerization of aniline (ANI) and utilized for the fabrication of Pt particles loaded catalyst electrode. PANI (NW) was doped with poly (styrene sulfonic acid) (PSS) by a sequential doping-dedoping-redoping process, to result a PANI (NW)-PSS spatial matrix. UV-vis spectroscopy confirms the success of doping-dedoping-redoping process to obtain PANI (NW)-PSS. Pt particles were deposited into the film of PANI (NW) and PANI (NW)-PSS by using potentiostatic mode (-0.2 V vs. Ag/AgCl). The morphology and structure of different PANI films were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). XPS results demonstrated that PANI (NW)-PSS has more positively charged nitrogens and minimum content of side products than simple PANI (NW). AES results revealed that Pt particles were distributed into the spatial regions of PANI (NW)-PSS. Cyclic voltammetry (CV) and chronoamperometry measurements were used to investigate the electrochemical properties, electrocatalytic activity and stability of PANI (NW)/Pt and PANI (NW)-PSS/Pt electrode towards oxidation of methanol. PANI (NW)-PSS/Pt electrode with a spatial distribution of Pt particles showed an improved catalytic performance towards oxidation of methanol than the PANI (NW)/Pt electrode.

Original languageEnglish
Pages (from-to)767-774
Number of pages8
JournalSynthetic Metals
Volume158
Issue number19-20
DOIs
Publication statusPublished - 2008 Nov

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Platinum particles dispersed polyaniline-modified electrodes containing sulfonated polyelectrolyte for methanol oxidation'. Together they form a unique fingerprint.

Cite this