<p>The advancement of modern hydrogen energy demands the exploration and enhancement of electrocatalytic processes for hydrogen evolution, oxygen evolution, and urea oxidation reactions, the latter being an energy-efficient alternative to oxygen evolution at the anode. In this study, the electrodeposition of nickel-containing coatings was investigated using deep eutectic solvent-based electrolytes, which are recognized as efficient and environmentally friendly alternatives to conventional aqueous solutions and organic solvent systems. The electrocatalytic performance of the coatings for hydrogen evolution, oxygen evolution, and urea oxidation reactions was also evaluated. A systematic analysis was conducted to examine the effect of Ni(II) ion concentration on the electrochemical properties and microstructure of the coatings. Cyclic voltammetry was employed to study the kinetics of Ni(II) electroreduction in deep eutectic solvent-based solutions. The results revealed a progressive transition from nickel hydroxide deposition to the formation of nanocrystalline nickel as the Ni(II) ion concentration increased. The coatings demonstrated high electrocatalytic activity for all three reactions. The kinetic parameters and potential mechanisms for hydrogen evolution, oxygen evolution, and urea oxidation reactions were determined and analyzed. These findings highlight the potential of nickel-based coatings for green hydrogen production and other renewable energy applications.</p> Graphical Abstract <p></p>