Write a note on hydrogen-oxygen fuel cell.

Explanation

Hydrogen-Oxygen Fuel Cell. Fuel cells are galvanic cells, in which chemical energy from combustion of fuels in converted into electrical energy fuel cells are designed to convert the energy of combustion of fuels like, hydrogen-oxygen fuel cells, hydrogen and oxygen react to from water providing electrical energies
Overall reaction occurs as follows

These cell have very high efficiency and are pollution-free, thus are used in space-craft. The `H_2O` produced can be used by the astronauts in space