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Fuel Cell Anode
The anode is the
negative electrode of the fuel cell. This electrode is in contact with the proton
exchange membrane (PEM) that is coated with a platinum-based catalyst.
The catalyst dissociates the hydrogen gas, H2 , into two protons,
H-, and two electrons, e-. If the external
circuit is complete, the electrons move from the anode to the cathode of
the fuel cell and neutralize the water molecule formed in the overall cell
reaction. The protons are transferred to the cathode through the PEM.
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