Recently electric vehicles and stationary fuel cells for domestic use, i.e., Enefarms have been commercialized and much concern has been focused on hydrogen supply, especially by electrolysis of water. General aspect of electrolysis of water has been given and discussed. Among the present energy resources, the best and the easy way of hydrogen production is to use fossil fuel. However the strict limit of CO2 emission, electric energy should be supplied by the recycling natural energy sources. Wind and solar energy are mild and suitable for energy supply without emission of hazard materials. However, the energy supply is quite changeable, therefore the electrolyser should be durable for heavy duty.
The method of hydrogen production including traditional electrolysis of water and the alternative electrolysis for hydrogen production have been shown and discussed.
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