Currently, fossil fuels serve as the primary energy source for humanity. Nevertheless, they are finite resources and their widespread consumption contributes significantly to CO2 emissions, which leads to severe consequences like global warming and climate change. Renewable energy sources are currently unreliable for decarbonization due to their variable outputs. A promising solution for the ecological transition is hydrogen, which acts as an energy carrier with low environmental impact. Various production technologies exist for hydrogen, primarily differentiated by their materials, costs, and emissions. At present, “grey hydrogen”, mainly produced via steam methane reforming (SMR), dominates the market and generates significant CO2 emissions.