sustainable green hydrogen h2 as an ecofriendly and promising fuel for the future industries

h2 gas molecule green hydrogen sustainable alternative clean eco energy fuel future industry renewable source carbon neutral zero emissions environmentally friendly climate change mitigation electrolysis water splitting proton exchange membrane pem polymer electrolyte cells pemfcs alkaline electrolyzer solid oxide cell sofc high temperature lowtemperature storage compressed liquefied cryogenic transportation infrastructure refueling stations production capture ccs