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Processes 2019, 7(2), 112;

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

Energy Safety Research Institute, Swansea University Bay Campus, Fabian way, Swansea SA1 8EN, UK
Author to whom correspondence should be addressed.
Received: 10 January 2019 / Revised: 14 February 2019 / Accepted: 18 February 2019 / Published: 21 February 2019
(This article belongs to the Special Issue Hydrogen Production Technologies)
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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. View Full-Text
Keywords: titanium nitride; stainless steel; alkaline electrolysis; energy storage titanium nitride; stainless steel; alkaline electrolysis; energy storage

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Gannon, W.J.F.; Jones, D.R.; Dunnill, C.W. Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings. Processes 2019, 7, 112.

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