Evaluation Of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers
Evaluation Of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers
The work describes the evaluation of Raney nickel electrodes prepared by the technique of atmospheric plasma spraying (APS). The APS Raney nickel layers of 30 ?m, 100 ?m and 300 ?m thicknesses were characterised prior to and post-chemical activation by SEM. Following further electrochemical activation, the performance of these layers towards hydrogen evolution reaction (HER) were evaluated using potentiodynamic Tafel analysis and electrochemical impedance spectroscopy (EIS) in 30% KOH solutions over the temperature range 30 °C–80 °C. Large surface area increases, in relation to smooth nickel, were obtained for these layers following activation and these were also confirmed from cyclic voltammetry measurements. The analysis of the data indicated that of the 3 thicknesses examined, the best electrocatalytic activity towards HER was obtained for 100 ?m sample, with an efficiency (based on the Higher Heating Value for H2) equal to 96% at a current density of 300 mA cm?2 and temperature of 70 °C
alkaline electrolyser, hydrogen, raney nickel, renewable energy, electrocatalyst
14380-14390
Chade, Daniel
7c6743ad-ae9c-465b-be5f-c7159492cd57
Berlouis, Leonard
1a77f219-5fa9-47e8-8f75-14acbb04ac97
Infield, David
4c9a5342-a1b9-4041-b85d-557184fcef05
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Nielsen, Peter Tommy
2e2a0313-2ae6-41fb-b4b1-6e04b7e7fd31
Mathiesen, Troels
13ecc8ea-633c-45f9-a85c-7980e6464734
13 November 2013
Chade, Daniel
7c6743ad-ae9c-465b-be5f-c7159492cd57
Berlouis, Leonard
1a77f219-5fa9-47e8-8f75-14acbb04ac97
Infield, David
4c9a5342-a1b9-4041-b85d-557184fcef05
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Nielsen, Peter Tommy
2e2a0313-2ae6-41fb-b4b1-6e04b7e7fd31
Mathiesen, Troels
13ecc8ea-633c-45f9-a85c-7980e6464734
Chade, Daniel, Berlouis, Leonard, Infield, David, Cruden, Andrew, Nielsen, Peter Tommy and Mathiesen, Troels
(2013)
Evaluation Of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers.
International Journal of Hydrogen Energy, 38 (34), .
(doi:10.1016/j.ijhydene.2013.09.012).
Abstract
The work describes the evaluation of Raney nickel electrodes prepared by the technique of atmospheric plasma spraying (APS). The APS Raney nickel layers of 30 ?m, 100 ?m and 300 ?m thicknesses were characterised prior to and post-chemical activation by SEM. Following further electrochemical activation, the performance of these layers towards hydrogen evolution reaction (HER) were evaluated using potentiodynamic Tafel analysis and electrochemical impedance spectroscopy (EIS) in 30% KOH solutions over the temperature range 30 °C–80 °C. Large surface area increases, in relation to smooth nickel, were obtained for these layers following activation and these were also confirmed from cyclic voltammetry measurements. The analysis of the data indicated that of the 3 thicknesses examined, the best electrocatalytic activity towards HER was obtained for 100 ?m sample, with an efficiency (based on the Higher Heating Value for H2) equal to 96% at a current density of 300 mA cm?2 and temperature of 70 °C
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Published date: 13 November 2013
Keywords:
alkaline electrolyser, hydrogen, raney nickel, renewable energy, electrocatalyst
Organisations:
Energy Technology Group
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Local EPrints ID: 378825
URI: http://eprints.soton.ac.uk/id/eprint/378825
ISSN: 0360-3199
PURE UUID: 6374a9e7-f21e-4ea6-8741-a21f6c66adef
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Date deposited: 16 Jul 2015 12:40
Last modified: 15 Mar 2024 03:43
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Author:
Daniel Chade
Author:
Leonard Berlouis
Author:
David Infield
Author:
Peter Tommy Nielsen
Author:
Troels Mathiesen
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