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

11 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

Fingerprint

Hydrogen
hydrogen
glassy carbon
Glassy carbon
gas chromatography
Gas chromatography
Platinum
phosphates
Phosphates
platinum
Cathodes
buffers
Lighting
cathodes
illumination
Vapors
vapor phases
Electrodes
electrodes
water

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

Cite this

Photo-electrocatalytic H2 evolution on poly(2,2′-bithiophene) at neutral pH. / Ng, Chun Hin; Winther-Jensen, Orawan; Kolodziejczyk, Bartlomiej; Ohlin, C. André; Winther Jensen, Bjorn.

In: International Journal of Hydrogen Energy, Vol. 39, No. 32, 31.10.2014, p. 18230-18234.

Research output: Contribution to journalArticle

Ng, Chun Hin ; Winther-Jensen, Orawan ; Kolodziejczyk, Bartlomiej ; Ohlin, C. André ; Winther Jensen, Bjorn. / Photo-electrocatalytic H2 evolution on poly(2,2′-bithiophene) at neutral pH. In: International Journal of Hydrogen Energy. 2014 ; Vol. 39, No. 32. pp. 18230-18234.
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