Electrodeposited Ni foam electrodes for increased hydrogen production in alkaline electrolysisElectrodeposited Ni foam electrodes for increased hydrogen production in alkaline electrolysis Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2025-05-082023enNickel foam electrodes were treated with a facile and cost-effective electrodeposition method to increase the hydrogen production efficiency in alkaline electrolysis setups. The treated electrodes (Electrodeposited Nickel Foam – ENF) exhibit enhanced electrochemical values compared to a bare nickel foam electrode (NF). A comprehensive analysis is presented on how the electrodeposition time determines the kinetics of hydrogen evolution reaction (HER) and the electrochemical values of the ENF electrodes. It was revealed that deposition time plays a decisive role in the total hydrogen production efficiency. In particular, the ENF electrode with 10 min of electrodeposition, presents a lower Tafel slope, lower overpotentials (|η10|=135 mV, |η100| = 230 mV), and enhanced hydrogen production (1.5 times higher) compared to an NF electrode. The improved characteristics are mainly attributed to the increased electrochemically active area (6.5 times higher than the NF electrode). Field emission scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were used for the structural and morphological analysis of the electrodeposited nickel foam electrodes.PL, MF, AK, NP acknowledge financial support from the European Union’s Horizon 2020 research and innovation program under grant agreement no 871124 Laserlab-Europe. The authors would like to acknowledge the HELLAS-CH national infrastructure (MIS 5002735) implemented under “Action for Strengthening Research and Innovation Infrastructures,” funded by the Operational Programme” Competitiveness, Entrepreneurship and Innovation” (NSRF 2014-2020) and co-financed by Greece and the European Union (European Regional Development Fund).http://creativecommons.org/licenses/by/4.0/Fuel: The Science and Technology of Fuel and Energy342 Poimenidis Ioannis Ποιμενιδης Ιωαννης Papakosta Nikandra Klini Argyro Farsari Maria Konsolakis Michail Κονσολακης Μιχαηλ Loukakos Panagiotis Moustaizis Stavros Μουσταιζης Σταυρος Elsevier Alkaline electrolysis Enhanced hydrogen production HER reaction Electrodeposition on Ni foam