Photo-electrocatalytic H2 evolution on poly(2,2′-bithiophene) at neutral pH |
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| Authors: | Chun Hin Ng,Orawan Winther-Jensen,Bartlomiej Kolodziejczyk,C. André Ohlin,Bjorn Winther-Jensen |
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| Affiliation: | 1. Department of Materials Engineering, Monash University, Clayton, 3800 Victoria, Australia;2. School of Chemistry, Monash University, Clayton, Victoria 3800, Australia |
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| 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 E0. 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. |
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| Keywords: | Hydrogen Photo-electrocatalyst Conducting polymer Renewable energy Polythiophene |
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