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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/433FAD1A-67C7-4038-AD6B-44C7A3529538 | ||
| Year | 2021 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
| License |
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| Bibliographic Citation | I. A. Poimenidis, M. D. Tsanakas, N. Papakosta, A. Klini, M. Farsari, S. D. Moustaizis, and P. A. Loukakos, “Enhanced hydrogen production through alkaline electrolysis using laser-nanostructured nickel electrodes,” Int. J. Hydrogen Energy, vol. 46, no. 75, pp. 37162-37173, Oct. 2021, doi: 10.1016/j.ijhydene.2021.09.010. https://doi.org/10.1016/j.ijhydene.2021.09.010 | ||
| Appears in Collections |
This study describes the fabrication of ultrafast laser-induced periodic nanostructures on Nickel sheets and their use as cathodes in alkaline electrolysis. For the first time, to the best of our knowledge, laser-nanostructured Ni sheets were used as cathode electrodes in a custom-made electrolysis cell at actual, Hydrogen producing conditions, and their efficiency has been compared to the untreated Nickel sheets. The electrochemical evaluation showed higher Jpeaks, lower overpotential, and enhanced double-layer capacitance for the nanostructured electrode. A decrease in the Tafel slope was also found for the nanostructured electrode. The hydrogen production efficiency was found to be 3.7 times larger for the laser-nanostructured Nickel electrode, which was also confirmed by current-time measurements during electrolysis. Also, a novel approach is proposed to improve the stability of the current density during electrolysis and, therefore, the hydrogen production process by about 10%.
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