Green Hydrogen production through water electrolysis is considered one of the most promising technologies for sustainable energy transition. However, Alkaline Water Electrolysis (AWE) presents several limitations. One of the most challenging is the formation of gas bubbles on the electrode surface, which reduces the overall efficiency of the system. This work thesis aims to optimize the operational parameters of AWE by developing numerical models to mitigate the negative effects of bubble formation. The work is divided into two main parts. The first involves the study of a simplified model, developed in COMSOL Multiphysics, which simulates the behavior of the Electric Double Layer (EDL) to understand better the microscopic phenomena that influence ion transport.