Energy systems of the future will need to be cleaner, more reliable, much efficient and sustainable. Hydrogen looks a promising energy carrier and considered to be one of the best candidates for replacing fossil fuels. But hydrogen is not an elemental form (H-2), it is found in nature only as part of other compounds such as natural gas, petroleum and coal, and can be produced generally by steam reforming. Splitting of water by electrolyses is also used a hydrogen production method. Except water splitting which is an expensive method, fossil fuels are not renewable sources.