Enhanced electrocatalytic performance for methanol oxidation of a novel Pt-dispersed poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) electrode

Chung Wen Kuo, Li Ming Huang, Ten Chin Wen, A. Gopalan

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)

Abstract

A new catalyst electrode was prepared in which Pt particles were homogeneously distributed into a poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) (PEDOT-PSS) matrix. Catalytic activity and stability for the oxidation of methanol were studied by using cyclic voltammetry and chronoamperometry. For comparative purposes, bulk Pt and PEDOT-PSS based electrodes were fabricated and tested. Enhanced electrocatalytic activity toward the oxidation of methanol was noticed when Pt particles were embedded into the PEDOT-PSS matrix. A high catalytic current for methanol oxidation (2.51 mA cm-2) was found for the PEDOT-PSS-Pt electrode in comparison to bulk Pt electrode (0.45 mA cm-2) at +0.6 V (versus Ag/AgCl). The enhanced electrocatalytic activity might be due to the dispersion of Pt particles into the PEDOT-PSS matrix and the synergistic effects between the dispersed Pt particles and the PEDOT-PSS matrix. The morphology and crystalline behavior of PEDOT-PSS-Pt and simple ITO/Pt films were determined by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) and correlated with the enhanced electrocatalytic activity for the Pt-dispersed PEDOT-PSS electrode.

Original languageEnglish
Pages (from-to)65-72
Number of pages8
JournalJournal of Power Sources
Volume160
Issue number1
DOIs
Publication statusPublished - 2006 Sep 29

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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