AI Article Synopsis
- The study explores a sustainable method for synthesizing hydrogen peroxide (HO) using photocatalysis, as an alternative to the traditional anthraquinone process.
- Two covalent organic frameworks (COF-O and COF-C) were developed to analyze how variations in pore wall chemistry influence photocatalytic efficiency.
- Results showed that COF-O exhibited improved hydrophilicity, reduced charge recombination, and a notable quantum yield of 10.3% for HO production, potentially paving the way for enhanced photocatalytic activity and selectivity.
Article Abstract
Photocatalytic synthesis of HO is an advantageous and ecologically sustainable alternative to the conventional anthraquinone process. However, achieving high conversion efficiency without sacrificial agents remains a challenge. In this study, two covalent organic frameworks (COF-O and COF-C) were prepared with identical skeletal structures but with their pore walls anchored to different alkyl chains. They were used to investigate the effect of the chemical microenvironment of pores on photocatalytic HO production. Experimental results reveal a change of hydrophilicity in COF-O, leading to suppressed charge recombination, diminished charge transfer resistance, and accelerated interfacial electron transfer. An apparent quantum yield as high as 10.3 % (λ=420 nm) can be achieved with HO and O through oxygen reduction reaction. This is among the highest ever reported for polymer photocatalysts. This study may provide a novel avenue for optimizing photocatalytic activity and selectivity in HO generation.
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| http://dx.doi.org/10.1002/anie.202410179 | DOI Listing |
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