Acetylene and Diacetylene Functionalized Covalent Triazine Frameworks as Metal-Free Photocatalysts for Hydrogen Peroxide Production A New Two-Electron Water Oxidation Pathway

Acetylene and Diacetylene Functionalized Covalent Triazine Frameworks as Metal-Free Photocatalysts for Hydrogen Peroxide Production : A New Two-Electron Water Oxidation Pathway

© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 2 vom: 03. Jan., Seite e1904433
1. Verfasser: Chen, Liang (VerfasserIn)
Weitere Verfasser: Wang, Lei, Wan, Yangyang, Zhang, Ying, Qi, Zeming, Wu, Xiaojun, Xu, Hangxun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 2D polymers covalent triazine frameworks hydrogen peroxide photocatalysis two-electron process
Beschreibung
Zusammenfassung:© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Metal-free polymer photocatalysts have shown great promise for photocatalytic H2 O2 production via two-electron reduction of molecular O2 . The other half-reaction, which is the two-electron oxidation of water, still remains elusive toward H2 O2 production. However, enabling this water oxidation pathway is critically important to improve the yield and maximize atom utilization efficiency. It is shown that introducing acetylene (CC) or diacetylene (CCCC) moieties into covalent triazine frameworks (CTFs) can remarkably promote photocatalytic H2 O2 production. This enhancement is inherent to the incorporated carbon-carbon triple bonds which are essential in modulating the electronic structures of CTFs and suppressing charge recombinations. Furthermore, the acetylene and diacetylene moieties can significantly reduce the energy associated with OH* formation and thus enable a new two-electron oxidation pathway toward H2 O2 production. The study unveils an important reaction pathway toward photocatalytic H2 O2 production, reflecting that precise control over the chemical structures of polymer photocatalysts is vital to achieve efficient solar-to-chemical energy conversion
Beschreibung:Date Completed 17.01.2020
Date Revised 01.10.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201904433