The main cause of climate change is the combustion of fossil fuels such as coal and natural gas, which emit greenhouse gases into the atmosphere. To counteract this phenomenon, there is a need for a green transition, in which renewable energies and related energy storage systems play the leading role. In this perspective, green hydrogen, i.e. hydrogen produced through electrolysis, using electricity from renewable sources, is certainly an important resource. Electrolysis can be done in an electrolyser which consists of an electrochemical cell capable of producing hydrogen through feeding of current, and water, from which the hydrogen is drawn. Among the electrolysers, one of the most interesting from the point of view of research is Proton Exchange Membrane Electrolysers Cell (PEMEC), which has a membrane capable of conducting ions.