Structural Modulation of Covalent Organic Frameworks for Efficient Hydrogen Peroxide Electrocatalysis

Angewandte Chemie, Год журнала: 2024, Номер 136(37)

Опубликована: Июнь 25, 2024

Abstract The electrochemical production of hydrogen peroxide (H 2 O ) using metal‐free catalysts has emerged as a viable and sustainable alternative to the conventional anthraquinone process. However, precise architectural design these electrocatalysts poses significant challenge, requiring intricate structural engineering optimize electron transfer during oxygen reduction reaction (ORR). Herein, we introduce novel covalent organic frameworks (COFs) that effectively shift ORR from four‐electron more advantageous two‐electron pathway. Notably, JUC‐660 COF, with strategically charge‐modified benzyl moieties, achieved continuous high H yield over 1200 mmol g −1 h for an impressive duration 85 hours in flow cell setting, marking it one most efficient non‐pyrolyzed reported date. Theoretical computations alongside situ infrared spectroscopy indicate markedly diminishes adsorption OOH* intermediate, thereby steering towards desired Furthermore, versatility was demonstrated through its application electro‐Fenton reaction, where efficiently rapidly removed aqueous contaminants. This work delineates pioneering approach altering pathway, ultimately paving way development highly effective electrocatalysts.

Язык: Английский

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Magnesium-promoted rapid self-reconstruction of NiFe-based electrocatalysts toward efficient oxygen evolution

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 677, С. 208 - 216

Опубликована: Июль 23, 2024

Язык: Английский

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Rational Construction of Honeycomb-like Carbon Network-Encapsulated MoSe2 Nanocrystals as Bifunctional Catalysts for Highly Efficient Water Splitting

Molecules, Год журнала: 2024, Номер 29(16), С. 3877 - 3877

Опубликована: Авг. 16, 2024

The scalable fabrication of cost-efficient bifunctional catalysts with enhanced hydrogen evolution reaction (HER) and oxygen (OER) performance plays a significant role in overall water splitting production fields. MoSe

Язык: Английский

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Scale-Up, Continuous and Low-Temperature Production of Multimetal Based Electrocatalysts toward Water Electrolysis

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(36), С. 47563 - 47570

Опубликована: Авг. 28, 2024

Electrocatalytic water splitting is a crucial strategy for advancing hydrogen energy and addressing the global crisis. Despite its significance, need straightforward swift method to synthesize electrocatalysts with exceptional performance remains pressing. In this study, we demonstrate novel approach preparation of multimetal-based in continuous flow reactor, enabling quick synthesis large number products through streamlined process. The resultant NiFe-LDH comprises nanoflakes high specific surface area requires only 255.4 mV overpotential achieve current density 10 mA·cm–2 1 M KOH, surpassing samples fabricated by conventional hydrothermal methods. Our can also be applied craft spectrum other electrocatalysts, including CoFe-LDH, CoAl-LDH, NiMn-LDH, NiCoFe-LDH. Additionally, electrocatalyst further anodic methanol electrooxidation coupled cathodic evolution. Moreover, simplicity generality our fabrication render it applicable facile various offering scalable solution quest high-performance catalysts sustainable technologies.

Язык: Английский

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A high-efficiency oxygen evolution electrocatalyst based on a Co3[Co (CN)6]2@NiFe LDH composite material

New Journal of Chemistry, Год журнала: 2024, Номер 48(15), С. 6625 - 6632

Опубликована: Янв. 1, 2024

The flower-like Co-PBA@NiFe-LDH-30 demonstrated remarkable electrochemical performance with a lower overpotential of 253 mV at 10 mA cm −2 and smaller Tafel slope 54 dec −1 during the OER process.

Язык: Английский

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