Alkaline fuel cells are the only sort of cell using hydrogren fuel I’m aware of. (NASA has used them to power satillites and space capsules.) And those require oxygen to create a reaction that produces water, heat, and electricity. I saw a demonstration in an old film where one was used to power a car. Water was a waste product shown trickling out of what would normally be an ICE exhaust pipe.
But I think even those require the hydrogen and oxygen to be liquified via cryogenics to be efficient enough to power something like a car...? And I don’t see something like that being safe enough for street use.
I’m sure there’s a retired engineer out there that can straighten out my limited knowledge of the subject.
...Or even a working one!😀