FAQ

In “Proton Exchange Membrane” or “Polymer Electrolyte Membrane” (PEM) electrolysis, a solid polymer electrolyte is used as a membrane. When an electrical voltage is applied, the water splits up. Oxygen, positively charged H+ ions (= protons) and free electrons are then produced. The H+ ions diffuse through the membrane to the cathode and react with the electrons to form hydrogen.

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