Solar‐driven seawater production H<sub>2</sub>O<sub>2</sub> catalyzed by hydroxyl functionalized crystalline K‐doped g‐C<sub>3</sub>N<sub>4</sub> under ambient conditions
Pan‐Pan Luo, Xinzhong Li, Bei‐Bei Qu, Hanyu Xue, Yanhui Yang
Abstract
Three hydroxyl functionalized crystalline K‐doped g‐C 3 N 4 were synthesized from dicyandiamide, melamine, ammonium chloride, ammonium oxalate, and ammonium citrate via ionothermal polycondensation using KCl as molten salt under N 2 atmosphere, which served as efficient recyclable photocatalysis realized that generating H 2 O 2 directly from seawater with air by 2e − ORR pathway under stimulated solar irradiation in ambient conditions. Under optimized conditions, the highest H 2 O 2 production rate of 1622 μmol g −1 h −1 for duration of 10 h was obtained. The cycling performances of HPCN‐2 displayed reusable for five times without noticeably loss of its catalytic activity. This work presents a real safer, sustainable, and economical approach for production of H 2 O 2 directly from abundant natural seawater.