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Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings

WILLIAM GANNON, Daniel Jones, Charlie Dunnill Orcid Logo

Processes, Volume: 7, Issue: 2, Start page: 112

Swansea University Authors: WILLIAM GANNON, Daniel Jones, Charlie Dunnill Orcid Logo

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DOI (Published version): 10.3390/pr7020112

Abstract

The use of hydrogen gas as a means of decoupling supply from demand is crucial for the transition to carbon-neutral energy sources and a greener, more distributed energy landscape. This work shows how simple commercially available titanium nitride coatings can be used to extend the lifetime of 316 g...

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Published in: Processes
ISSN: 2227-9717
Published: MDPI AG 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49702
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Abstract: The use of hydrogen gas as a means of decoupling supply from demand is crucial for the transition to carbon-neutral energy sources and a greener, more distributed energy landscape. This work shows how simple commercially available titanium nitride coatings can be used to extend the lifetime of 316 grade stainless-steel electrodes for use as the cathode in an alkaline electrolysis cell. The material was subjected to accelerated ageing, with the specific aim of assessing the coating’s suitability for use with intermittent renewable energy sources. Over 2000 cycles lasting 5.5 days, an electrolytic cell featuring the coating outperformed a control cell by 250 mV, and a reduction of overpotential at the cathode of 400 mV was observed. This work also confirms that the coating is solely suitable for cathodic use and presents an analysis of the surface changes that occur if it is used anodically.
Keywords: titanium nitride; stainless steel; alkaline electrolysis; energy storage
College: Faculty of Science and Engineering
Issue: 2
Start Page: 112

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