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PEMFC Basics |
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The PEM fuel cell consists of two electrodes, the anode and the cathode, separated by a polymer electrolyte membrane (PEM). Each of the electrodes is coated on one side with a platinum-based catalyst. Oxygen passes over one electrode and hydrogen over the other, generating electricity, water and heat.
Hydrogen fuel is delivered into the anode side of the PEM fuel cell. Ambient Oxygen enters the cathode side. Activated by the catalyst, a hydrogen molecule splits into 2 protons and 2 electrons. The protons pass through the membrane. The electrons pass through an external circuit creating a direct electrical current that can be utilized before they return to the cathode. Electrons, protons, and oxygen combine at cathode side to form water and generate by-product heat. |
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