PtTaO2N

PtTaO₂N is a mixed-metal oxynitride semiconductor combining platinum, tantalum, oxygen, and nitrogen in a single crystalline phase. This is a research-stage material developed for photocatalytic and electrochemical applications, representing the broader class of transition-metal oxynitrides that offer tunable band gaps and enhanced charge carrier properties compared to conventional oxides. The material shows promise in visible-light-driven catalysis and water-splitting, where the nitrogen incorporation narrows the band gap relative to pure tantalum oxide, enabling absorption of longer wavelengths while platinum provides catalytic surface sites.