AI Article Synopsis
- Photocatalytic generation of hydrogen peroxide (HO) is hindered by slow conversion kinetics of the superoxide radical (O), which has low reactivity and high energy demands.
- A lattice-strain strategy has been developed to improve the conversion of O to active singlet oxygen (O) by optimizing the spacing between adjacent active sites, enhancing HO production.
- In a notable example, ZnInS nanosheets with 0.7% compressive strain achieved a yield of 3086.00 μmol g h of HO, attributed to improved electron coupling between compressed Zn sites, highlighting the potential for atomic-scale optimization in photocatalytic processes.
Article Abstract
Photocatalytic hydrogen peroxide (HO) generation is largely subject to the sluggish conversion kinetics of the superoxide radical (O) intermediate, which has relatively low reactivity and requires high energy. Here, we present a lattice-strain strategy to accelerate the conversion of O to highly active singlet oxygen(O) by optimizing the distance between two adjacent active sites, thereby stimulating HO generation via low-barrier oxygen-oxygen coupling. As the initial demonstration, the defect-induced strain in ZnInS nanosheet optimizes the distance of two adjacent Zn sites from 3.85 to 3.56 Å, resulting in that ZnInS with 0.7% compressive strain affords 3086.00 μmol g h yield of HO with sacrificial agent. This performance is attributed to the strain-induced enhancement of electron coupling between the compressed adjacent Zn sites, which promotes low-barrier oxygen-oxygen coupling to active O intermediate. This finding paves the way for atomic-scale manipulation of reactive sites, offering a promising approach for efficient HO photosynthesis.
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| http://dx.doi.org/10.1016/j.scib.2024.12.014 | DOI Listing |
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Compressive interatomic distance stimulates photocatalytic oxygen-oxygen coupling to hydrogen peroxide.
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Article Synopsis
- Photocatalytic generation of hydrogen peroxide (HO) is hindered by slow conversion kinetics of the superoxide radical (O), which has low reactivity and high energy demands.
- A lattice-strain strategy has been developed to improve the conversion of O to active singlet oxygen (O) by optimizing the spacing between adjacent active sites, enhancing HO production.
- In a notable example, ZnInS nanosheets with 0.7% compressive strain achieved a yield of 3086.00 μmol g h of HO, attributed to improved electron coupling between compressed Zn sites, highlighting the potential for atomic-scale optimization in photocatalytic processes.
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