Water splitting is utilized as a regenerative life supporting system and is part of the energy conversion process in nature. Its manipulation is often accomplished through the application of electrical potential by an external power supply. In order to develop a cost-effective and environment friendly technology, many researchers have focused on this fi eld.Photocatalytic splitting of water into H2 and O2 using a catalyst and the solar energy is one of the ideal approaches. Besides, biological hydrogen production processes are also found to be environment friendly and less energy intensive.Among these technologies, the energy source for water splitting includes solar, chemical, and thermal energy; whereas, the mechanical energy is rarely involved,which is, however, of major interest, due to its universal availability.