Fuel cell

Fuel cells are designed to generate electrical energy. This example uses hydrogen moving through an anode catalyst. The chemical reaction in the anode strips the electron from the hydrogen ion, leaving an ionised hydrogen atom and an electron. The electrons are used to generate a current as they pass through a circuit, through a load or resistance, providing electrical energy. They then enter back into the cathode catalyst, where another chemical reaction takes place – combining introduced oxygen and hydrogen molecules, forming water and heat energy.