Mechanistic analysis of multiple processes controlling solar-driven H2O2 synthesis using engineered polymeric carbon nitride

• DOI: 10.1038/s41467-021-24048-1
• Publication Date: 2021-06-17T10:03:09Z
• Authors: Yubao Zhao; Peng Zhang; Zhenchun Yang; Lina Li; Jingyu Gao; Sheng Chen; Tengfeng Xie; Caozheng Diao; Shibo Xi; Beibei Xiao; Chun Hu; Wonyong Choi
• Keywords: Carbon nitride; Quantum yield; Carbon fibers; Moiety

Abstract Solar-driven hydrogen peroxide (H 2 O ) production presents unique merits of sustainability and environmental friendliness. Herein, efficient solar-driven H through dioxygen reduction is achieved by employing polymeric carbon nitride framework with sodium cyanaminate moiety, affording a rate 18.7 μmol h −1 mg an apparent quantum yield 27.6% at 380 nm. The overall photocatalytic transformation process systematically analyzed, some previously unknown structural features interactions are substantiated via experimental theoretical methods. cyanamino group pyridinic nitrogen-coordinated soidum in the promote photon absorption, alter energy landscape improve charge separation efficiency, enhance surface adsorption dioxygen, create selective 2e − oxygen reaction surface-active sites. Particularly, electronic coupling interaction between surface, which boosts population prolongs lifetime active shallow-trapped electrons, experimentally substantiated.