Carbon doped and PTCDA co-construct S-scheme heterojunction to tune boron nitride for boosted photosynthesis hydrogen peroxide

The development of novel metal-free catalysts to photosynthesize hydrogen peroxide (H 2 O 2 ) is recognized as a prospective technology for sustainable energy conversion. Herein, the carbon-doped boron nitride (BCN) and perylene tetracarboxylic dianhydride (PTCDA) formed PDA@BCN S-scheme heterojunctions with π-π stacking, which catalyzed the production of H 2 O 2 at an unexpectedly high yield of 285.47 μmol h −1 g −1 in air. The high photocatalytic performance is attributed to the enhanced light absorption resulting in abundant carrier excitation, rapid charge separation driven by S-scheme heterojunctions, and highly selective H 2 O 2 formation pathway. Theoretical calculations demonstrate that carbon sites in PDA@BCN can serve as an advanced active center for oxygen enrichment and activation, promoting oxygen reduction and efficient photocatalytic production of H 2 O 2 . This work lays the foundation for the design of efficient, stable, and reusable photocatalysts for environmental restoration and energy conversion.