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

Chemistry

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

Q. Wu, J. Cao, et al.

Discover how researchers, including Qingyao Wu and colleagues, have developed a groundbreaking metal-free photocatalyst that produces H₂O₂ at an unprecedented rate of 1776 µmol g⁻¹h⁻¹ in real seawater, defying limitations posed by salt on conventional photocatalysts. This innovative approach leverages a phenolic condensation process, paving the way for more effective H₂O₂ production methods.

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Playback language: English
Abstract
Artificial photosynthesis of H₂O₂ from H₂O and O₂ has gained significant attention. However, most photocatalysts are deactivated by salt, limiting their applications. This study introduces a metal-free photocatalyst, synthesized using a phenolic condensation approach, composed of carbon dots, procyanidins, and 4-methoxybenzaldehyde. This catalyst shows exceptional H₂O₂ production (1776 µmol g⁻¹h⁻¹ in real seawater), exceeding that of a pure polymer by 4.8 times. Photoelectrochemical and transient photovoltage analyses clarify the active site and catalytic mechanism in seawater, opening new avenues for efficient and practical H₂O₂ photoproduction.
Publisher
Nature Communications
Published On
Jan 20, 2021
Authors
Qingyao Wu, Jingjing Cao, Xiao Wang, Yan Liu, Yajie Zhao, Hui Wang, Yang Liu, Hui Huang, Fan Liao, Mingwang Shao, Zhenghui Kang
Tags
artificial photosynthesis
photocatalysis
H₂O₂ production
metal-free catalysts
seawater
carbon dots
photoelectrochemical analysis

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