•Hydrogen fuel is fed into the "anode"
of the fuel cell. Oxygen (or air) enters
the fuel cell through the cathode.
Encouraged by a catalyst, the hydrogen
atom splits into a proton and
an electron, which take different
paths to the cathode. The proton
passes through the electrolyte.
The electrons create a separate
current that can be utilized before they
return to the cathode, to be reunited
with the hydrogen and oxygen in a
molecule of water.