Exploration and optimisation of poly(2,2′-bithiophene) as a stable photo-electrocatalyst for hydrogen production

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

An organic photo-electrochemical catalyst for the hydrogen evolution reaction (HER) based on the conducting polymer, poly(2,2′-bithiophene) (PBTh), is further explored. Long-term stability testing shows the successful operation of the catalyst over a period of 12 days at neutral pH with corresponding turnover numbers exceeding 6 × 104. Experimental parameters such as substrate type, electrolyte, pH and thickness of the film are explored and their subsequent effects on catalytic behaviour and performance discussed. Significant findings include the four-fold increase in performance by the reduction of thickness to better facilitate charge transfer and the successful photo-catalysis of the HER at pH 11, with an onset that is 0.14 V below E0. Faradaic efficiency was also determined with a maximum recorded efficiency of 80% despite known losses such as crossover reactions and H2 escape from within the system.

Original languageEnglish
Pages (from-to)11358-11366
Number of pages9
JournalJournal of Materials Chemistry A
Volume3
Issue number21
DOIs
Publication statusPublished - 2015 Jun 7
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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