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This research explores the pivotal domain of hydrogen production through photocatalytic processes, providing insights into its potential as a sustainable energy source. In the initial section, the role of hydrogen as a versatile energy carrier is discussed, emphasizing its importance in meeting the world's energy needs. An extensive overview of current hydrogen production methods is provided, emphasizing their limitations. The research also highlights the significance of photocatalytic semiconductor materials and tandem cell configurations, pointing towards innovative approaches for enhancing hydrogen production. The core of this research involves a comprehensive literature review. It delves into the theory of water-splitting, elucidating the principles of photocatalytic water-splitting within photoelectrochemical (PEC) cells. The application of photocatalysis for water-splitting is examined, along with a deep dive into the factors that influence this process. These factors include the recombination of photogenerated charge carriers, the mechanisms underlying photoanode instability, and the substantial impact of photocurrent density on hydrogen production efficiency. In addition, the integration of Dye-Sensitized Solar Cells (DSSC) as an auxiliary technology is also being explored. By addressing the limitations of current hydrogen production methods and providing a comprehensive overview of photocatalytic processes, this work lays the foundation for further advancements in sustainable energy production. The findings open doors to innovative research, offering pathways to overcome challenges and optimize hydrogen production through photocatalysis for a greener and more sustainable future. In conclusion, this research unearths the potential for clean hydrogen production and renewable energy solutions. • Emphasizing the significance of hydrogen as an energy carrier and the diverse methods used to produce it. • Delves into the subject of photocatalytic semiconductor materials and tandem cells, illustrating their roles in hydrogen production. • Encompassing hydrogen production methods, the theoretical and principles of photocatalytic water splitting, and the utilization of TiO 2 photocatalysts in PEC cells. • Explore the integration of Dye Solar Cell (DSC) to act as an additional layer in the photovoltaic system. [ABSTRACT FROM AUTHOR]