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

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

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13 Citations (Scopus)

Abstract

An organic photo-electrochemical catalyst for the hydrogen evolution reaction (HER) based on the conducting polymer, poly(2,20-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

Cite this

Ng, Chun Hin ; Winther-Jensen, Orawan ; Ohlin, C. Andre ; Winther-Jensen, Bjorn. / Exploration and optimisation of poly(2,2'-bithiophene) as a stable photo-electrocatalyst for hydrogen production. In: Journal of Materials Chemistry A. 2015 ; Vol. 3, No. 21. pp. 11358 - 11366.
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Exploration and optimisation of poly(2,2'-bithiophene) as a stable photo-electrocatalyst for hydrogen production. / Ng, Chun Hin; Winther-Jensen, Orawan; Ohlin, C. Andre; Winther-Jensen, Bjorn.

In: Journal of Materials Chemistry A, Vol. 3, No. 21, 2015, p. 11358 - 11366.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Winther-Jensen, Orawan

AU - Ohlin, C. Andre

AU - Winther-Jensen, Bjorn

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AB - An organic photo-electrochemical catalyst for the hydrogen evolution reaction (HER) based on the conducting polymer, poly(2,20-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.

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