Photo-electrocatalytic H2 evolution on poly(2,2′-bithiophene) at neutral pH

Chun Hin Ng, Orawan Winther-Jensen, Bartlomiej Kolodziejczyk, C. André Ohlin, Bjorn Winther Jensen

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Vapour phase polymerised (VPP) polybithiophene (PBTh) on glassy carbon is revealed to be an efficient photo-electrocatalytic electrode for the hydrogen evolution reaction (HER). An onset potential of-0.03 V vs SCE for the HER is observed on illumination using visible light in 0.1 mol L-1 phosphate buffer at pH 6.9, 600 mV lower in energy than E. Hydrogen evolution is confirmed using gas chromatography with a calculated faradaic efficiency of 34% when holding at a potential of-0.5 V. Importantly, this process occurs without platinum and under neutral aqueous conditions thus revealing a significant but overlooked application for PBTh: a potential low-cost cathode material for the splitting of water.

Original languageEnglish
Pages (from-to)18230-18234
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number32
DOIs
Publication statusPublished - 2014 Oct 31
Externally publishedYes

Keywords

  • Conducting polymer
  • Hydrogen
  • Photo-electrocatalyst
  • Polythiophene
  • Renewable energy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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    Ng, C. H., Winther-Jensen, O., Kolodziejczyk, B., Ohlin, C. A., & Winther Jensen, B. (2014). Photo-electrocatalytic H2 evolution on poly(2,2′-bithiophene) at neutral pH. International Journal of Hydrogen Energy, 39(32), 18230-18234. https://doi.org/10.1016/j.ijhydene.2014.09.003