1. Durable Photosynthesis of Hydrogen Peroxide Using a Uranyl Coordination Polymer: Exciton Dissociation and Hydrogen Abstraction.
- Author
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Yuan M, Jiang L, Li J, Li Z, Song J, Wang X, Ma Z, Wang Y, and Liu W
- Abstract
The photosynthesis of hydrogen peroxide (H
2 O2 ), involving water oxidation and oxygen reduction, is crucial for optimizing light utilization. Here, a previously synthesized one-dimensional chain-like semiconductive uranyl coordination polymer (NDC-UCP) was used for the efficient overall photosynthetic reaction of H2 O2 and its photocatalytic mechanism was systematically investigated. The excellent stability of NDC-UCP enables continuous H2 O2 production for up to 96 h. Its unique hydrogen extraction capability enhances the photocatalytic performance, achieving a H2 O2 production rate of 283.80 μmol g-1 h-1 . Two mechanisms for H2 O2 generation were revealed: efficient electron-hole separation in NDC-UCP facilitates a two-step one-electron oxygen reduction and direct water oxidation, while hydrogen abstraction of UO2 2+ generates hydroxyl (·OH) and hydroperoxyl radicals (HO2 · ), enhancing H2 O2 photosynthesis. This study highlights the potential of uranyl coordination polymers in H2 O2 production and their synergistic exciton dissociation and hydrogen abstraction functionalities in photocatalytic redox reactions.- Published
- 2024
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