The fuel cell is consisted of anode, cathode, and electrolyte membrane.
The fuel cell is working via passing H₂ through the anode and O₂ through the cathode.
The hydrogen molecules are split into electrons and protons at the anode.
Then, the protons pass via the electrolyte membrane, while electrons are forced to move through a circuit, producing an electric current and excess heat.
The protons, electrons, and oxygen combine to produce water molecules at the cathode.
Due to the high efficiency of fuel cells, FGs are very clean, with their only by-products being electricity, excess heat, and water.
Additionally, as fuel cells do not have any moving parts, they operate near-silently.