A fuel cell is used for the electrolysis of water breaking apart the hydrogen and oxygen atoms. The hydrogen is returned to the fuel cell to power it and the oxygen is used to power a motor. Is this even feasible? I have a feeling I'm missing something and would appreciate any input you may have.
A fuel cell is perhaps 80% efficient. An electrolysis cell is less, perhaps 50%. So you are losing energy in both steps. The amount of hydrogen you get out is probably 40% of the hydrogen you use up. How do you use oxygen to power a motor? That doesn't work either.
