Basic Components and Operation of a Fuel Cell

Electrodes are usually composed of a gas diffusion layer with thin catalyst coatings at the electrode-electrolyte interfaces. Hydrogen and oxygen reactants are supplied to the anode and cathode electrodes surfaces. The original rod-type electrodes are generally replaced with flat or circular annular surfaces to increase the contact surface area for reactions. The structure of the electrode is 

A three-layer hydrogen-oxygen fuel cell. 

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