ABSTRACT
Water is seen as a natural source of hydrogen, which is an environment-friendly alternative to the non-renewable energy sources. Hydrogen is an energy carrier that shows tremendous potential to replace the fossil fuel dependence of mankind; thus, there are several efforts with respect to existing hydrogen production methodologies to refine the hydrogen generation efficiency and its economy. The basic fact relies with the splitting of water molecule by providing thermodynamic energy of 1.23 eV to obtain hydrogen. The evolution of this technology is hindered due to inefficient ways of generation as high cost is involve in the hydrogen generation. The present chapter deals with the discussion of existing status of diffident methodologies being used for hydrogen generation in industries. Apart from this, it provides an exhaustive status of electrocatalytic hydrogen generation. The evolving fields of solar thermal as well as photocatalytic hydrogen production are discussed to present recent status on the solar-based water splitting.
