Hydrogen Generation via Photoelectrochemical Splitting of Water
Overutilization of conventional fuels and narrow utilization of alternative energy sources leading to energy crisis is a grim matter of concern. Switching over to a new energy system from classical energy system is only a solution by which proper civilization of energy can be made. In this respect, hydrogen energy system has great potential to replace current energy system due to its various favorable properties. In this new energy regime, hydrogen will be the energy carrier and this will change whole economic, political, and social scenario as coal did at the foundation of the industrial age.
Among the three essential components of hydrogen – based energy scenario, i.e., production, storage, and transportation, the production of hydrogen has received considerable attention. While hydrogen can be generated using different technologies, only some of them are environment friendly. Of the many approaches to produce hydrogen from renewable sources, direct splitting of water into hydrogen and oxygen in a photoelectrochemical cell using solar energy is an ideal method.
To take this technology to the market, conversion efficiency should be 10% and material stability must be greater than 2000 h. To develop the PEC system having desired efficiency and stability is still a challenge and lot of research is going on to increase the efficiency to make this technology viable.
In this chapter, we will discuss the basic principle of PEC splitting of water to produce an energy carrier, hydrogen, along with different techniques, strategic tools and approaches to enhance the efficiency and stability of PEC system.
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