An investigation of the properties of conducting polymer alloys for water oxidation

Matthew P. Gustafson, Kei Matsumoto, Douglas R. Macfarlane, Bjorn Winther Jensen

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This study investigates the effects of blending two conducting polymers with the aim to form an alloy photo-electrocatalyst for water oxidation. Establishing a catalyst of this nature - one that is capable of reducing the overpotential of a given electrochemical reaction through exposure to light - has the potential to aid in the development of a cost-effective water-splitting process driven by sunlight. In this work, a multi-step oxidative vapour-phase polymerisation (VPP) process was used to create a polymer mixture. This was achieved by first polymerising a layer of poly(3,4-ethylenedioxythiophene) (PEDOT) onto a substrate before placing in a chamber filled with selected monomers, namely poly(thieno[3,2-b]thiophene) (PTT) or poly(dithieno[3,2-b: 2′,3′-d]thiophene) (PDTT). This allowed the monomer to polymerise with the residual oxidant within the initial PEDOT to form an interpenetrating network. Spectroscopic, electrochemical and electrical characterisation revealed a certain level of spontaneous interaction between the conducting polymer species within the mixtures, while a photo-enhanced effect of the water oxidation reaction was observed upon illumination.

Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalElectrochimica Acta
Volume122
DOIs
Publication statusPublished - 2014 Mar 10
Externally publishedYes

Keywords

  • PEDOT
  • Thienothiophene
  • Vapour phase polymerisation
  • Water oxidation

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

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