Nanocatalysts impregnated polythiophene electrodes for the electrooxidation of formic acid

V. Selvaraj, M. Alagar*, I. Hamerton

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

59 Citations (Scopus)

Abstract

Conductive and porous polythiophene (PTh) films, which are used as host matrixes for Pt and Pt-Pd nanoparticles, are synthesized electrochemically. PTh films containing nanometer-sized Pt and Pt-Pd bimetallic particles are electro synthesized on an indium doped tin oxide (ITO) plate by voltammetric cycling between -0.2 and +1.4 V (versus Ag/AgCl/3 M NaCl). The ensuing PTh electrode, modified with nanoparticles, was probed for its catalytic activity towards the electrooxidation of formic acid, an industrially important material. The modified electrode exhibits significant eletrocatalytic activity towards the oxidation of formic acid and this may be attributed to (a) the uniform dispersion of nanoparticles in the PTh film and (b) the efficacy of the nature of Pd species in Pt-Pd bimetallic systems. Monometallic (Pt) and bimetallic (Pt-Pd) nanoparticles are found to be uniformly dispersed in PTh matrixes as confirmed from analytical data using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Energy dispersive X-ray analysis (EDAX) is used to characterize the composition of metal present in the nanoparticles modified electrodes.

Original languageEnglish
Pages (from-to)172-179
Number of pages8
JournalApplied Catalysis B: Environmental
Volume73
Issue number1-2
DOIs
Publication statusPublished - 24 Apr 2007

Keywords

  • bimetallic nanoparticles
  • Electrocatalytic oxidation
  • Formic acid oxidation
  • Fuel cells
  • Platinum nanoparticles
  • Polythiophene
  • Pt-Pd

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