Ethynyl‐Linked Donor–Acceptor Covalent Organic Framework for Highly Efficient Photocatalytic H₂O₂ Production

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Photocatalytic H 2 O synthesis from and is considered to be one of the most promising alternative approaches for manufacturing . Developing highly active selective photocatalysts significant in achieving efficient photosynthesis. Herein, an ethynyl‐linked donor–acceptor covalent organic framework (COF), named EBBT‐COF, prepared condensation reaction between electron‐deficient unit 4,4′,4″‐(1,3,5‐benzenetriyltri‐2,1‐ethynediyl)tris‐benzenamine electron‐rich benzo[1,2‐b:3,4‐b′:5,6‐b″]trithiophene‐2,5,8‐tricarboxaldehyde. Powder X‐ray diffraction N adsorption isotherm unveil crystalline porous hcb network EBBT‐COF with pores size centered at ca 2.3 nm. Spectroscopic characterizations demonstrate excellent visible‐light absorption capacity enhanced photo‐induced charge separation transport efficiency owing its architecture. Density functional theory calculations electrochemical tests indicate high activity selectivity toward 2e − reduction water oxidation triethynylbenzene trithiophene moieties accelerate ‐to‐H O‐to‐H conversion, respectively. These merits enable a photocatalyst generation yield rate 5 686 µmol g −1 h , optimal apparent quantum 15.14%, solar‐to‐chemical conversion 1.17% (λ > 400 nm), representing best performance among COF‐based reported thus far.

Language: Английский

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Recent Progress in Oxygen Reduction Reaction Toward Hydrogen Peroxide Electrosynthesis and Cooperative Coupling of Anodic Reactions

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Abstract Electrosynthesis of hydrogen peroxide (H 2 O ) via two‐electron oxygen reduction reaction (2e − ORR) is a promising alternative to the anthraquinone oxidation process. To improve overall energy efficiency and economic viability this catalytic process, one pathway develop advanced catalysts decrease overpotential at cathode, other couple 2e ORR with certain anodic reactions full cell voltage while producing valuable chemicals on both electrodes. The performance catalyst depends not only material itself but also environmental factors. Developing electrocatalysts high selectivity activity prerequisite for efficient H electrosynthesis, coupling appropriate would further enhance efficiency. Considering this, here comprehensive review presented latest progress state‐of‐the‐art in different media, microenvironmental modulation mechanisms beyond design, as well electrocatalytic system various reactions. This presents new insights regarding existing challenges opportunities within rapidly advancing field, along viewpoints future development electrosynthesis construction green roadmaps.

Language: Английский

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Manipulating carbon defects for rapid H2O2 and ·OH formation: A strategy for efficient electrocatalytic organic pollutant degradation

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132610 - 132610

Published: March 1, 2025

Language: Английский

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Tuning α‐MnOOH Formation via Atomic‐Level Fe Introduction for Superior OER Performance

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Abstract The arrangement of atoms in the catalyst directly impacts catalytic performance. Herein, a heteroatom doping strategy is found as an effective approach for regulation MnO 2 crystal reconstruction during oxygen evolution reaction (OER), thereby ensuring and optimizing performance catalyst. Real‐time tracking dynamic surface reveals that δ‐MnO transforms into less active γ‐MnOOH phase, while single‐atom Fe facilitates formation highly α‐MnOOH phase. asymmetric Fe─O─Mn bonds induce lattice distortions promote electron transfer from to Mn with increase 3 ⁺ content, which conducive intensifying spillover crucial factor OER activity. Theoretical calculations also demonstrate sites regulated representative can reduce energy barrier step process (the *O *OOH transition), thus significantly enhancing typical achieves successful processes through doping, holds significant implications developing new class catalysts, not limited catalysts reported this study.

Language: Английский

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Oriented Channel Functionalization in Covalent Organic Framework Fibers for Boosting the Antibiotics Removal from Environmental Water

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 4, 2025

The excessive presence of antibiotics in water is a significant social concern, as it poses serious health risks to humans, necessitating the urgent development effective removal methods. Herein, an interfacial polymerization method presented fabricate caterpillar-like covalent organic frameworks (COF) platform with branch buds (Tp-Bpy) and utilize post-modified modulate environment channels. Tp-Bpy channels grafted Cu ions ether-oxygen chains (Mae) afforded more recognition sites inner hindrance, thereby enhancing antibiotic capacity efficiency through synergistic interactions controlled analyte diffusion. Cu@Tp-Bpy-Mae exhibited significantly higher capacities (412.79-435.49 mg g-1) for four antibiotics, far surpassing those Tp-Bpy, Cu@Tp-Bpy, other documented material, due electrostatic forces, π-π interactions, coordination bonding, hydrogen bonding. More importantly, capable treating real wastewater concentrations below 0.02 L-1 under continuous flow conditions, effectively mitigating drinking caused by high levels. This study offers facile tailoring material properties optimize performance exhibits great potential environmental pollutant removal.

Language: Английский

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Anchoring of Cu nanoparticles on the surface of magnetic separable high-entropy oxides for ultrafast catalytic degradation of sulfadiazine

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132804 - 132804

Published: April 1, 2025

Language: Английский

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Fluorine doped carbon aerogel prepared from spent cathode carbon of aluminum electrolysis towards electrocatalytic synthesis of H2O2

Sustainable Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Fluorine doped carbon aerogels were prepared from spent cathode in aluminum electrolysis and used for electrocatalytic synthesis of H 2 O .

Language: Английский

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