Advanced Functional NiCo₂S₄@CoMo₂S₄ Heterojunction Couple as Electrode for Hydrogen Production via Energy‐Saving Urea Oxidation

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Abstract The urea oxidation reaction (UOR) is characterized by a lower overpotential compared to the oxygen evolution (OER) during electrolysis, which facilitates hydrogen (HER) at cathode. Charge distribution, can be modulated introduction of heterostructure, plays key role in enhancing adsorption and cleavage chemical groups within molecules. Herein, facile all‐room temperature synthesis functional heterojunction NiCo 2 S 4 /CoMo grown on carbon cloth (CC) presented, as‐prepared electrode served as catalyst for simultaneous reaction. Density Functional Theory (DFT) study reveals spontaneous transfer charge heterointerface , triggers formation localized electrophilic/nucleophilic regions electron donating/electron withdrawing group molecules UOR. // pair required only cell voltage 1.17 1.18 V deliver current density 10 100 mA cm −2 respectively electrolysis display very good stability. Tests performed real urine samples show similar catalytic performance electrolytes, making work one best transition metal‐based catalysts UOR applications, promising both efficient production decomposition.

Язык: Английский

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Donor–Acceptor Type Covalent Organic Frameworks for Photocatalytic Hydrogen Evolution

ChemistrySelect, Год журнала: 2025, Номер 10(14)

Опубликована: Апрель 1, 2025

Abstract Covalent organic frameworks (COFs) as a new type of crystalline porous material with tunable structures are widely used in the field photocatalytic hydrogen evolution (PHE) due to their large specific surface area and abundant active sites. However, electron‐hole recombination during reaction process hinders progress reaction. Donor–acceptor (D–A) COFs can effectively promote charge carrier transport enhance light harvesting capability by introducing D units A into framework. The D–A have unique advantages PHE. This concept review concentrates on recent developments for PHE necessary modules constructing COFs. Moreover, it summarizes challenges faced development directions future.

Язык: Английский

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Boosting Photoconductivity by Increasing the Structural Complexity of Multivariate Covalent Organic Frameworks

Small, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 20, 2024

The assessment of the photoconductivity Donor-Acceptor (D-A) ordered bulk heterojunctions is gaining attention for development innovative organic semiconductors in optoelectronics. Here, synthesis pyrene-based (D) Covalent Organic Frameworks, achieve through a multivariate reaction involving two distinct acceptors reported (A). products are characterized using powder x-ray diffraction, N

Язык: Английский

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Linker Length Engineering toward Enhanced Photocatalytic Aerobic Oxidation in Benzothiadiazole-Based Covalent Organic Frameworks

ACS Materials Letters, Год журнала: 2024, Номер unknown, С. 393 - 400

Опубликована: Дек. 26, 2024

The intrinsic structural advantages and tunability of covalent organic frameworks (COFs) have made them promising photocatalysts for various photocatalytic reactions. However, it remains a great challenge to systematically tune the linker lengths build linker-length-dependent structure-performance relationship COFs-based photocatalysts. Herein, five isoreticular COFs with sql underlying nets been successfully synthesized using benzothiadiazole-based ditopic aldehydes varied 1,3,6,8-tetrakis(4-aminophenyl)pyrene as building units. obtained exhibit significantly different activities toward aerobic oxidation. Remarkably, COF-containing vinyl group, HIAM-0020, exhibited best performance near-unity conversion selectivity oxidative benzylamine coupling within 2 h. experimental theoretical investigations indicate that HIAM-0020 exhibits faster charge separation ability lower migration resistance compared other four COFs. This work represents guidance rational design synthesis COF-based achieve efficient transformation.

Язык: Английский

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Synthesis of Asymmetric Imine Polymers for Highly Selective Sorting of Semiconducting Single-Walled Carbon Nanotubes by Two in One Strategy

Polymer Chemistry, Год журнала: 2024, Номер 15(46), С. 4753 - 4762

Опубликована: Янв. 1, 2024

An asymmetric imine polymer was obtained by a two-in-one strategy, which shows high selectivity sorting towards semiconductor-SWCNTs and can be removed thoroughly easily TFA stimuli.

Язык: Английский

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