The dramatic events related to climate change continue to highlight the importance of achieving the decarbonization targets set at the COP21 conference in Paris, supported by various policies, such as the European Green Deal. In the years of recovery from the COVID-19 pandemic, the huge energy crisis triggered by Russia's invasion of Ukraine has put all previously assumed energy scenarios to the test. Technologies based on renewable energy sources are key to achieving the goals of decarbonization scenarios, and among these, green hydrogen is considered one of the most promising energy carriers. However, its production by electrolysis of water needs to be studied in more detail.