Fuel Cell Anode Reaction

At the anode, the hydrogen molecules from the fuel supply are dissociated into protons
(positive hydrogen ions) and electrons. The reaction requires energy and is written:

H₂ Þ 2H⁺ + 2e^_

The dissociation reaction is assisted by the platinum based catalyst on the electrode and the dissociation rate is determined by the supply of thermal energy from the surroundings.