In alkaline solutions the HER mechanism involves water dissociation and subsequent hydrogen reduction and adsorption (H 2 O + e - H ads + OH -), in the Volmer step, which is followed by, either the Heyrovsky step (H ads + H 2 O + e - H 2 + OH -) or by the Tafel step (2H ads H 2 ) . Recent improvements in the cost and performance of electrochemical water splitting technologies point towards a more economically viable future for their application at an industrial scale . Currently, the two prevalent methods for obtaining hydrogen are proton-exchange membrane (PEM) electrolysis and alkaline water electrolysis (AWE) . The hydrogen production efficiency of PEM electrolyzers is higher but requires Pt-based catalysts . In the case of AWE, the key goal is high catalytic activity and stability under intermittent polarization in alkaline media . It is well known that the HER rate in alkaline media is inferior to that in acidic ones because of the additional water dissociation step , precedes the discharge step, but also due to the blockage of active sites by adsorbed hydroxyl ions, but also partly due to hydroxyl ion adsorption resulting in the blockage of active sites . On the other hand, HER in alkaline media leads to less environmental pollution and equipment corrosion .