**2.3 Electrolytic method**

This method uses electricity to get hydrogen and oxygen from decomposition of water. Now a days electrolytic water splitting is well developed and available in market commercially. This method is more efficient as compared to previous methods for production of hydrogen. Ultra-pure hydrogen can be produced by using electrolysis method. Also, bulk amount of hydrogen can be produced using this method but, the assembly required for this purpose is expensive [15]. Excess amount of energy is required in the form of overpotential to overcome activation barriers. If excess energy is not supplied the rate of hydrogen production is merely slow. Lately, hydrogen production using this method is not in demand as hydrogen can be generated in affordably amount from fossil fuels.
