Increase in global energy demand and environmental polution have made the search for renewable, low-emission energy technologies not merely an academic exercise but an urgent practical necessity. Among the various strategies under active investigation, photocatalytic water splitting for hydrogen production has attracted remarkable interest as a clean, scalable, and chemically elegant approach to solar energy conversion. Hydrogen is an exceptionally promising energy carrier owing to its high energy density, zero-carbon combustion product, and broad compatibility with existing fuel cell infrastructure. The photocatalytic route, which harnesses incident solar radiation to drive the thermodynamically uphill dissociation of water into hydrogen and oxygen, offers a pathway to sustainable fuel generation without the need for external electrical input, provided that the photocatalyst satisfies well-defined thermodynamic and kinetic criteria. Many 2D materials have been used for the production of energy via photocatalytic water spliting but it is limited by their absorption in the ultra violet region which constitute <5% of solar irradiation. Through first principle DFT calculation SiC/Al₂OS van der Waals heterostructure is investigated to enhance the photocatalytic efficiency of these materials for hydrogen production, HER and OER. Electronic properties (Bandgap, Charge Density Difference, PDOS, Workfunction) have been investigated via this study.