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Issue 21, 2015
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Exploration and optimisation of poly(2,2′-bithiophene) as a stable photo-electrocatalyst for hydrogen production

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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.

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

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Publication details

The article was received on 14 Jan 2015, accepted on 17 Apr 2015 and first published on 20 Apr 2015


Article type: Paper
DOI: 10.1039/C5TA00291E
J. Mater. Chem. A, 2015,3, 11358-11366

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

    C. H. Ng, O. Winther-Jensen, C. A. Ohlin and B. Winther-Jensen, J. Mater. Chem. A, 2015, 3, 11358
    DOI: 10.1039/C5TA00291E

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