How Does a Proton Exchange Membrane (PEM) Fuel Cell Work?
In a PEM fuel cell, hydrogen gas is introduced at the anode where it is split into protons and electrons by a platinum catalyst. The protons pass through the proton exchange membrane to the cathode, while the electrons travel through an external circuit, generating electricity. At the cathode, oxygen molecules react with the protons and electrons, forming water as a byproduct.
