A Powder Metallurgy Route to Produce Raney-Nickel Electrodes for Alkaline Water Electrolysis

A powder metallurgy route is described as a promising route to produce highly active Raney-Ni electrodes. An expanded Ni mesh was used as metallic substrate on the surface of which Raney-Ni phases were produced via a heat-treatment step using Al powder at different loads. The overpotential at −300 m...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2019, Vol.166 (6), p.F357-F363
Main Authors: Bernäcker, Christian Immanuel, Rauscher, Thomas, Büttner, Tilo, Kieback, Bernd, Röntzsch, Lars
Format: Article
Language:English
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Summary:A powder metallurgy route is described as a promising route to produce highly active Raney-Ni electrodes. An expanded Ni mesh was used as metallic substrate on the surface of which Raney-Ni phases were produced via a heat-treatment step using Al powder at different loads. The overpotential at −300 mA/cm² as well as the active surface area were determined to evaluate the electrodes. The results reveal that a high Al loading is necessary to achieve a stable electrode and a high activity for the hydrogen evolution reaction.
ISSN:0013-4651
1945-7111
DOI:10.1149/2.0851904jes