Abstract
AbstractSolar‐driven H2O2 production via the oxygen reduction reaction (ORR) and water oxidation reaction (WOR) dual channels is green and sustainable but severely restricted by the sluggish reaction kinetics. Constructing intriguing photocatalysts with effective active centers is a shortcut to breaking the kinetic bottleneck with great significance. Herein, we synthesize two novel neutral phenanthridine‐based covalent organic frameworks (PD‐COF1 and PD‐COF2) for photosynthesizing H2O2. Compared to the no phenanthridine counterpart (AN‐COF), the H2O2 photosynthetic activities of PD‐COF1 and PD‐COF2 are markedly boosted. In air and pure water without sacrificial agents, under Xe lamp and natural sunlight, the H2O2 photogeneration rate of PD‐COF2 is 6103 and 3646 μmol g−1 h−1, respectively. Further experimental and theoretical inspections demonstrate that introducing phenanthridine units into COFs smoothly modulates the charge carrier dynamics and thermodynamically favors the generation of crucial OOH* and OH* intermediates in the ORR and WOR paths, respectively. Additionally, this is the first time the neutral phenanthridine moiety serves as the photooxidation unit for 2e− WOR towards H2O2 photoproduction. The current work sheds light on exploring novel catalytic centers for high‐performance H2O2 evolution.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
