Hydrogen Fuel Cell

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A fuel cell consists of two electrodes-a negative electrode (or anode) and a positive electrode (or cathode) – sandwiched around an electrolyte. A fuel, such as hydrogen, is fed to the anode, and air is fed to the cathode. In a hydrogen fuel cell, a catalyst at the anode separates hydrogen molecules into protons and electrons, which take different paths to the cathode. The electrons go through an external circuit, creating a flow of electricity.  The protons migrate through the electrolyte to the cathode, where they unite with oxygen and the electrons to produce water and heat. (US Department of Energy, How Fuel Cells Work, accessed 6/29/2021)