Depletion in the resources of fossil fuels and its hazardous effects on environment are the biggest concerns of this century. Researchers have suggested solar energy as a sustainable and viable solution to overcome this problem. But due to the sporadic nature of solar energy, it is essential to store it. The hydrogen fuel is one of the chemical energy forms for storing solar energy. However, the production of hydrogen is the most demanding step in the overall energy-harnessing process. The water-splitting process is one of the most innovative ways to produce hydrogen. The sustainable evolution of hydrogen gas depends on well-designed water oxidation step in the overall water-splitting process. Water oxidation is a challenging half reaction because of the four electron process. The oxidation reaction taking place at the photoanode can be significantly improved with better design of the photocatalytic system. An enhanced water oxidation reaction proves to improve the efficiency of hydrogen production and thus more storage of solar energy as well.