What Materials Are Used as Catalysts in PEC Water Splitting?
A variety of materials have been explored as catalysts in PEC water splitting, including transition metal oxides, sulfides, and phosphides. Some commonly studied materials include titanium dioxide (TiO2), hematite (Fe2O3), and tungsten trioxide (WO3). These materials are chosen based on their ability to absorb sunlight, their stability in aqueous environments, and their catalytic activity.