sonicj01

(I don't know a lot about science so pls explain things simply I had an idea and I want to know if it would work, and if so what kind of energy it would need to do it big scale. My idea is to connect a reverse osmosis module to an electrolysis device to produce hydrogen and oxygen from brine. If this works, would it be able to be used on a submarine/ship to extract hydrogen for fuel? Thanks!