Structurally Locked High-Crystalline Covalent Triazine Frameworks Enable Remarkable Overall Photosynthesis of Hydrogen Peroxide

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(43), P. 29943 - 29954

Published: Oct. 17, 2024

The development of green and efficient hydrogen peroxide (H

Language: Английский

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Insights into excitonic behavior in single-atom covalent organic frameworks for efficient photo-Fenton-like pollutant degradation

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 17, 2025

The generation of radicals through photo-Fenton-like reactions demonstrates significant potential for remediating emerging organic contaminants (EOCs) in complex aqueous environments. However, the excitonic effect, induced by Coulomb interactions between photoexcited electrons and holes, reduces carrier utilization efficiency these systems. In this study, we develop Cu single-atom-loaded covalent frameworks (CuSA/COFs) as models to modulate effects. Temperature-dependent photoluminescence ultrafast transient absorption spectra reveal that incorporating acenaphthene units into linker (CuSA/Ace-COF) significantly exciton binding energy (Eb). This modification not only enhances peroxymonosulfate adsorption at active sites but also facilitates rapid electron transfer promotes selective hydroxyl radical generation. Compared CuSA/Obq-COF (Eb = 25.6 meV), CuSA/Ace-COF 12.2 meV) shows a 39.5-fold increase pseudo-first-order rate constant sulfamethoxazole degradation (0.434 min-1). work provides insights modulating behavior single-atom catalysts via engineering EOCs degradation.

Language: Английский

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Enhanced electrochemical CO₂-to-ethylene conversion through second-shell coordination on a Cu single-atom catalyst

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(15), P. 9075 - 9087

Published: Jan. 1, 2024

The electrocatalytic CO 2 reduction reaction (CO RR) utilizing Cu single-atom catalyst modulation through second-shell S coordination (Cu–C 3 N 4 –S) achieves predominant catalytic activity with high C H faradaic efficiency at low potentials.

Language: Английский

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Synergistic Tri‐efficiency Enhancement Utilizing Functionalized Covalent Organic Frameworks for Photocatalytic H₂O₂ Production

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 23, 2024

The overall maximization of photocatalytic H

Language: Английский

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Engineering exciton dissociation and intermolecular charge transfer to boost superoxide radical in conjugated microporous polymers for simultaneous elimination of coexisting contaminants

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156552 - 156552

Published: Oct. 11, 2024

Language: Английский

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Modulating Yeager Adsorption Configuration of O₂ Through Cd Doping in Zn₃In₂S₆ for Photosynthesis of H₂O₂

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Abstract The photocatalytic oxygen reduction reaction (ORR) is a key pathway for producing hydrogen peroxide (H 2 O ). While most previous studies have focused on the two‐step 2e − ORR process, one‐step two‐electron route offers thermodynamic and kinetic advantages that can significantly enhance activity selectivity. In this study, photocatalyst design reported by incorporating cadmium into vacancy‐rich Zn 3 S 6 (Cd‐S V /ZIS). This catalyst enables H production via process without use of sacrificial agents, achieving high yield 39.42 µmol g −1 min under UV–vis light irradiation, outperforming ZIS‐based photocatalysts. Theoretical simulations experimental results demonstrate Cd doping improves carrier kinetics catalyst, broadens its absorption range, promotes Yeager adsorption configuration , leading to highly active selective generation. study provides insights efficient photocatalysts production.

Language: Английский

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Mild and selective synthesis of imines and N-Heterocyclic compounds via formic acid-mediated reductive coupling strategy over Nitrogen-Coordinated cobalt Single-Atom catalysts

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152774 - 152774

Published: June 7, 2024

Language: Английский

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Synergistic Coordination in Cu Single‐Atom Catalysts Enhances High‐Valent Copper‐Oxo Species for Efficient PMS Activation

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

In the domain of heterogeneous catalytic activation peroxymonosulfate (PMS), high-valent metal-oxo (HVMO) species are widely recognized as potent oxidants for abatement organic pollutants. However, generation selectivity and efficiency HVMO often constrained by stringent requirements catalyst adsorption sites electron transfer efficiency. this study, a single-atom catalyst, Cu

Language: Английский

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Advances in Constructing Efficient Photocatalytic Systems for Hydrogen Peroxide Production: Insights from Synchrotron Radiation Research

Artificial photosynthesis., Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Hydrogen peroxide (H2O2) is a promising energy carrier and widely implemented as an eco-friendly oxidant in organic synthesis, wastewater treatment, other industrial healthcare sectors. The photocatalytic H2O2 production using O2 H2O raw materials, powered by sunlight, represents green chemical process with the advantages of mild reaction conditions, controllable operation, negligible secondary pollution. With increased focus on sustainable production, comprehensive timely review needed to deepen insight into this conversion from material design strategies dynamic catalytic mechanisms. In review, pathways for modification photocatalysts are systematically discussed. Moreover, advanced synchrotron radiation X-ray absorption spectroscopy its application generation carefully analyzed. Finally, outlines challenges future prospects associated which aims offer valuable insights guidelines rational high-performance toward generation.

Language: Английский

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Nb2c Mxene Quantum Dots Modulate Built-In Electric Field within Heterostructures for Efficient Solar-to-H2o2 Conversion from Seawater

Published: Jan. 1, 2025

Language: Английский

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