The choice of photocatalyst is crucial for the efficiency of hydrogen production. Common materials include:
Titanium Dioxide (TiO2): Widely used due to its stability, non-toxicity, and high activity under UV light. Zinc Oxide (ZnO): Similar to TiO2 but with different band gap properties. Cadmium Sulfide (CdS): Effective under visible light but less stable and more toxic.
