Numerical simulation of water electrolysis using COMSOL Multiphysics

This article presents the results of a numerical simulation of the spatial distribution of electrochemical parameters during water electrolysis in a bipolar cell using the COMSOL Multiphysics software package. The study focuses on analyzing the profiles of current density, H⁺/OH⁻ ion concentrations, and pH along the interelectrode space (0-100% of the distance between the cathode and anode). It was found that an alkaline zone (pH > 10), dominated by OH⁻ ions, forms near the cathode, while an acidic zone (pH