Molecular engineering of carbon nitrides for overall photosynthesis of H_(2)O_(2)

Artificial photocatalysis offers a promising strategy to sustainably produce hydrogen peroxide(H_(2)O_(2))that is one of the most valuable multifunctional chemicals.Among various photocatalysts,polymeric carbon nitride(pCN)has drawn continuous attention in non-sacrificial H_(2)O_(2)production.However,the poor activ-ity of half reactions,ie.,the oxygen reduction reaction(ORR)and water oxidation reaction(WOR),greatly restricts the efficiency of photocatalytic H_(2)O_(2) production.In this highlight,we discuss the significant ad-vances in molecular engineering of carbon nitrides for H_(2)O_(2) photosynthesis and the importance of the deep understanding of the photocatalysis process for rational design and reaction pathways of organic conjugated polymers to address the growing H_(2)O_(2)demand.Furthermore,we summarize the emerging applications of photocatalytic H_(2)O_(2)productions beyond energy and environment.