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Spontaneous exciton dissociation in organic photocatalyst under ambient conditions for highly efficient synthesis of hydrogen peroxide.

ABSTRACT: SignificanceHydrogen peroxide is a highly competitive ready-to-use product for solar energy transformation. Nevertheless, the contemporary photosynthetic systems are not efficient enough, due to severe charge recombination caused by high activation energy and binding energy of the exciton. Herein, we achieve spontaneous exciton dissociation at room temperature. Moreover, the photosynthesis of H2O2 reaches between 9,366 and 12,324 µmol·g-1 from 9 AM to 4 PM in ambient conditions, that is, sunlight irradiation, real water including fresh water and seawater, room temperature, and open air. The ultrahigh photocatalytic efficiency in ambient conditions allows the solar-to-chemical conversion in a real cost-effective and sustainable way, which represents an important step toward real applications.

SUBMITTER: Yan H 

PROVIDER: S-EPMC9295752 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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Spontaneous exciton dissociation in organic photocatalyst under ambient conditions for highly efficient synthesis of hydrogen peroxide.

Yan Huijie H   Shen Minhui M   Shen Yong Y   Wang Xu-Dong XD   Lin Wei W   Pan Jinhui J   He Jian J   Ye Yu-Xin YX   Yang Xin X   Zhu Fang F   Xu Jianqiao J   He Jianguo J   Ouyang Gangfeng G  

Proceedings of the National Academy of Sciences of the United States of America 20220523 22

SignificanceHydrogen peroxide is a highly competitive ready-to-use product for solar energy transformation. Nevertheless, the contemporary photosynthetic systems are not efficient enough, due to severe charge recombination caused by high activation energy and binding energy of the exciton. Herein, we achieve spontaneous exciton dissociation at room temperature. Moreover, the photosynthesis of H<sub>2</sub>O<sub>2</sub> reaches between 9,366 and 12,324 µmol·g<sup>-1</sup> from 9 AM to 4 PM in amb  ...[more]

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