A fuel cell converts chemical energy into electrical energy through an electromechanical reaction. A typical fuel cell consists of two electrodes, the anode and the cathode, which react to generate electricity. While liquid electrolytes carry electrically charged elements from one electrode to another, a catalyst is required to speed up the chemical reaction inside the fuel cell. Methanol, biogas, hydrogen, natural gas, and hydrocarbons are various fuels used in fuel cells.