Using earth abundant materials for the catalytic evolution of hydrogen from electron-coupled proton buffers

Symes, M. , Cogdell, R. , Macdonald, L., McGlynn, J., Irvine, N., Alshibane, I., Bloor, L., Rausch, B., Hargreaves, J. S.J. and Cronin, L. (2017) Using earth abundant materials for the catalytic evolution of hydrogen from electron-coupled proton buffers. Sustainable Energy and Fuels, 1(8), pp. 1782-1787. (doi:10.1039/C7SE00334J)

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Abstract

Hydrogen has a large array of uses throughout the chemical and energy industries, yet is largely produced through the reformation of fossil fuels. Renewable production of hydrogen, via electrolytic water splitting, could be key to moving beyond fossil fuel reliance, but research has mainly focused on maximising efficiency to increase the performance of the electrolysis process. Access to cheap, renewable earth abundant materials to produce hydrogen could be argued to be of equal importance. Electron-coupled proton buffers (ECPBs) have been shown to separate the oxygen and hydrogen evolution reactions of water electrolysis (OER and HER) in space and time, but have previously relied on precious metal catalysts to produce H2. Herein, we report the use of four earth abundant catalysts capable of spontaneously evolving hydrogen from reduced ECPBs. The hydrogen production rate was found to be influenced by both the onset potential of the HER for a particular catalyst, and the redox potential of the ECPB used. The catalysts were shown to evolve hydrogen at rates up to 9.4 mmol H2 per h per mg catalyst and up to 60% of the theoretical maximum hydrogen capacity of the ECPBs.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cogdell, Professor Richard and Alshibane, Ihfaf and Symes, Dr Mark and Irvine, Miss Nicola and Hargreaves, Professor Justin and Bloor, Dr Leanne and McGlynn, Jessica and Cronin, Professor Leroy and Macdonald, Mr Lewis
Authors: Symes, M., Cogdell, R., Macdonald, L., McGlynn, J., Irvine, N., Alshibane, I., Bloor, L., Rausch, B., Hargreaves, J. S.J., and Cronin, L.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Sustainable Energy and Fuels
Publisher:Royal Society of Chemistry
ISSN:2398-4902
ISSN (Online):2398-4902
Published Online:16 August 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Sustainable Energy and Fuels 1(8):1782-1787
Publisher Policy:Reproduced under a Creative Commons License

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