Hydrogen Fuel Cell system
A fuel cell supplied with hydrogen and oxygen, convert chemical energy into electrical energy. Therefore a fuel cell continuously supplied with hydrogen and oxygen can generate electricity to power a vehicle. This can be explained under an electrochemical reaction, according to the equation:
2 H2 + O2 = 2 H2O
Hydrogen fuel cells are electrochemical cells. They have two electrodes in contact with a material that can conduct ions, called an electrolyte. One electrode is the anode and the other is the cathode. The electrodes in hydrogen fuel cells are relatively stable since they act as catalysts in the release of electrons and are not chemically changed during this process. Therefore, when pure hydrogen is used as the fuel, the only by-products generated from the fuel cell are pure water and heat. This makes fuel cells potentially very efficient devices with minimal environmental impact.