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Enhanced hydrogen production through alkaline electrolysis using laser-nanostructured nickel electrodes

Poimenidis Ioannis, Tsanakas Michael D., Papakosta Nikandra, Klini Argyro, Farsari Maria, Moustaizis Stavros, Loukakos Panagiotis A.

Πλήρης Εγγραφή


URI: http://purl.tuc.gr/dl/dias/433FAD1A-67C7-4038-AD6B-44C7A3529538
Έτος 2021
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά 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
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Περίληψη

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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