Laboratory (GENFUEL) Photoelectrochemical Alkaline water electrolysis, AWE Proton exchange membrane electrolysis, PEME Solid oxide electrolysis, SOE Hydrogen Production Route & Color Biological Dark-fermentation Photo-fermentation Electrochemical AWE PEME SOE Green Hydrogen Pink Hydrogen Nuclear energy Renewable energy Steam reforming Partial oxidation Autothermal reforming Thermal decomposition Gasification & pyrolysis w/o CCUS with CCUS Brown/Grey Hydrogen Blue Hydrogen Turquoise Hydrogen Solid carbon Thermochemical 27