This strategic exposure of platinum significantly enhances the catalytic photoelectrochemical performance of the material. The accessible platinum centers facilitate efficient electron transfer and adsorption of reactant molecules, critical for catalytic reactions like hydrogen evolution or other redox processes. The improved electron density near the platinum sites minimizes overpotentials, thereby increasing the catalytic efficiency and selectivity. Furthermore, the enhanced exposure reduces mass transport limitations, allowing reactants to interact with the active sites more readily. Collectively, this design not only boosts the catalytic activity but also improves the durability and reusability of the material in photoelectrochemical applications, making it a highly efficient and sustainable catalyst.