Hydrogen is a vital ingredient in chemical (majorly in synthesis of ammonia), metallurgical, glass, semiconductor, and pharmaceuticals industries . The calculated demand for hydrogen in fossil fuels free future is expected to increase to more than two gigaton per year . The majority of all hydrogen produced globally comes from natural gas (50%), primarily through steam methane reforming (reaction of steam and natural gas) and the rest is generated from oil (30%), coal (16%), and electrolysis of water (4%). The by-products of the major synthesis processes are complex mixtures of condensable hydrocarbons and CO2. This causes emission of 830 Mt of CO2 per year, which is detrimental to the environment. Therefore, the instantaneous hydrogen production from water splitting will unleash the full environmental benefits.