Catalytic electroxidation pathway for electropolymerization of polypyrrole in solutions containing gold nanoparticles

Yu Chuan Liu, Kuang Hsuan Yang

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11 Citations (Scopus)


We report here the first electrochemical polymerization of polypyrrole (PPy) on Au substrates in aqueous solutions containing additives of prepared Au nanoparticles with a diameter of ca. 2 nm. Encouragingly, the synthesized PPy films demonstrate novel characteristics due to the effects of Au nanoparticles, which provide a catalytic electroxidation pathway. The prepared PPy shows a stereomorphology, which is distinguishable from the typically granular raspberry morphology of pure PPy, and a rougher surface. The conductivity of PPy is significantly increased (∼10 times), which also reflects on the extremely high oxidation level of 0.36 revealed from the analysis of X-ray photoelectron spectroscopy (XPS). The mechanism of the nucleation and growth, and the X-ray diffraction (XRD) pattern were investigated to explain the specific characteristics of PPy films.

Original languageEnglish
Pages (from-to)5376-5382
Number of pages7
JournalElectrochimica Acta
Issue number25
Publication statusPublished - Jul 28 2006
Externally publishedYes



  • Au nanoparticles
  • Catalytic electroxidation
  • Polypyrrole
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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