A metal-free photocatalyst for highly efficient hydrogen peroxide photoproduction in real seawater

Qingyao Wu, Jingjing Cao, Xiao Wang, Yan Liu, Yajie Zhao, Hui Wang, Yang Liu (), Hui Huang, Fan Liao, Mingwang Shao () and Zhenghui Kang ()
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Qingyao Wu: Soochow University
Jingjing Cao: Soochow University
Xiao Wang: Soochow University
Yan Liu: Soochow University
Yajie Zhao: Soochow University
Hui Wang: Soochow University
Yang Liu: Soochow University
Hui Huang: Soochow University
Fan Liao: Soochow University
Mingwang Shao: Soochow University
Zhenghui Kang: Soochow University

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Artificial photosynthesis of H2O2 from H2O and O2, as a spotless method, has aroused widespread interest. Up to date, most photocatalysts still suffer from serious salt-deactivated effects with huge consumption of photogenerated charges, which severely limit their wide application. Herein, by using a phenolic condensation approach, carbon dots, organic dye molecule procyanidins and 4-methoxybenzaldehyde are composed into a metal-free photocatalyst for the photosynthetic production of H2O2 in seawater. This catalyst exhibits high photocatalytic ability to produce H2O2 with the yield of 1776 μmol g−1h−1 (λ ≥ 420 nm; 34.8 mW cm−2) in real seawater, about 4.8 times higher than the pure polymer. Combining with in-situ photoelectrochemical and transient photovoltage analysis, the active site and the catalytic mechanism of this composite catalyst in seawater are also clearly clarified. This work opens up an avenue for a highly efficient and practical, available catalyst for H2O2 photoproduction in real seawater.

Date: 2021
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DOI: 10.1038/s41467-020-20823-8

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