Magneto‐Electrochemical Ammonia Synthesis: Boosting Nitrite Reduction Activity by the Optimized Magnetic Field Induced Spin Polarized System

Advanced Energy Materials, Год журнала: 2024, Номер 14(42)

Опубликована: Сен. 25, 2024

Abstract Using low and optimized magnetic field along with electric is a novel strategy to facilitate electrochemical nitrite reduction reaction (NO 2 RR). Herein, the assisted electrocatalytic ammonia synthesis employing spin‐thrusted β‐MnPc at 95 mT explored. The calculated rate of generation 16603.4 µg h −1 mg cat , which almost twice that nonpolarized manganese phthalocyanine (MnPc) catalyst. Additionally, Faradaic efficiency (FE) –0.9 V versus RHE found be 92.9%, significantly higher compared MnPc In presence external field, catalysts provide better electron transfer channel results in lower charge resistance hence performances. Density functional theory (DFT) result further verifies induced has potential barrier (0.51 eV) for protonation NO* than (1.08 eV), confirms enhanced ammonia.

Язык: Английский

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Spin-mediated electrocatalytic nitrate reduction to ammonia on two-dimensional transition metal borides

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159775 - 159775

Опубликована: Янв. 1, 2025

Язык: Английский

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Chirality‐Induced Spin Selectivity Enables New Breakthrough in Electrochemical and Photoelectrochemical Reactions

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июль 4, 2024

To facilitate the transition from a carbon-energy-dependent society to sustainable society, conventional engineering strategies, which encounter limitations associated with intrinsic material properties, should undergo paradigm shift. From theoretical viewpoint, spin-dependent feature of oxygen evolution reaction (OER) reveals potential spin-polarization strategy in enhancing performance electrochemical (EC) reactions. The chirality-induced spin selectivity (CISS) phenomenon attracts unprecedented attention owing its utility achieving novel breakthroughs. This paper starts experimental results aimed at efficiency OER focusing on EC system based CISS phenomenon. applicability is verified through various analytical methodologies clarify groundwork and mechanisms underlying pathway. discussion then extended effective spin-control strategies photoelectrochemical effect. Exploring influence spin-state control kinetic thermodynamic aspects, this perspective also discusses effect polarization induced by OER. Lastly, future directions for redox systems are discussed, including expansion chemical reactions development materials capabilities.

Язык: Английский

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Molecular Nanojunction Catalyst for Oxygen Evolution Reaction

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 26, 2025

Abstract Achieving close integration and strong electronic communication between molecular catalysts conductive substrates is crucial for developing the stability catalytic activity of nanomaterials. However, constructing heterostructure catalyst usually need complex demanding synthesis processes. Herein, a facile universal “molecular nanojunction” strategy developed to prepare with high by improving coplanarity nanojunction facilitating efficient electron transfer. The density function theory (DFT) calculations in situ characterization indicate that reduces excessive * OH adsorption accelerates deprotonation process, thereby promoting oxygen generation. shows better evolution reaction (OER) performance than most reported catalysts. What's more, are applied alkaline anion exchange membrane (AEM) electrolysis cells, exhibiting excellent performance.

Язык: Английский

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External field-assisted catalysis

eScience, Год журнала: 2025, Номер unknown, С. 100398 - 100398

Опубликована: Март 1, 2025

Язык: Английский

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A Versatile C/Fe₃O₄/C Self‐Heating Electrode for Universal Application of Alternating Magnetic Fields in Electrocatalytic Hydrogen Production

Advanced Functional Materials, Год журнала: 2024, Номер 34(40)

Опубликована: Июнь 18, 2024

Abstract The high‐frequency alternating magnetic field (AMF) is considered as a fascinating heating treatment that provides noninvasive solution to enhance the catalytic efficiency of electrocatalyst. However, practical applications AMF in electrochemistry are primarily concentrated on mediums. To broaden its application into nonmagnetic catalysts, herein, practicable method reported by modifying working electrode substrate with Fe 3 O 4 nanoparticles (NPs), which serves both and self‐heating medium virtue rapid efficient effect associated Néel relaxation triggered external AMF, thus boosting catalyst performance upon it. verify it, Pt NPs single atoms (SAs), two representative non‐magnetic catalyst, selected for trials. results, reveal that, when applied, NPs@C/Fe /C SAs@C/Fe display remarkable enhancement hydrogen evolution reaction magnetocurrent density respectively ≈ 146% ≈185%, whereas unmodified bare glassy carbon there show unnoticeable change performance. developed strategy opens up vast space exploiting energy weak, non‐invasive field.

Язык: Английский

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Experimental study on improved method of electroosmosis combined with magnetic field

Acta Geotechnica, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Язык: Английский

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Downscaling magnetic field gradients for structured copper magnetoelectrodeposition on the micrometer scale

Electrochimica Acta, Год журнала: 2025, Номер unknown, С. 145994 - 145994

Опубликована: Март 1, 2025

Язык: Английский

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^*H Species Regulation of Heterostructured Cu₂O/NiO Nanoflowers Boosting Tandem Nitrite Reduction for High‐Efficiency Ammonia Production

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Abstract Ambient electrocatalytic reduction of NO 2 − to NH 3 (NO RR) provides a reliable route for migrating pollutants and simultaneously generating valuable 3. However, the RR involves multistep electron transfer complex intermediates, rendering achievement high selectivity major challenge. In this contribution, heterostructured Cu O/NiO nanoflowers are explored incorporating advantages dual active sites as highly selective catalyst. Combined theoretical calculations in situ FTIR/EPR spectroscopy analysis, it is revealed synergistic effect O NiO promote energetics heterostructure electrocatalyst through tandem catalysis pathway, where activates initial absorption deoxygenation boosting * formation, while generated on then transferred substrate with abundant hydrogen conversion. Moreover, formation enhances H retention capacity, promoting consumed inhibiting inter‐ species binding. As result, equipped flow cell displays superior yield rate 128.2 mg h −1 cm −2 Faradaic efficiency 97.1% at current density −1.25 A . Further, designed system proven be adaptable other electrochemical production reactions including reduction.

Язык: Английский

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Innovations in graphene-based electrochemical biosensors in healthcare applications

Microchimica Acta, Год журнала: 2025, Номер 192(5)

Опубликована: Апрель 9, 2025

Abstract The isolation of a single atomic layer graphite, known as graphene, marked fundamental moment that transformed the field materials science. Graphene-based nanomaterials are recognized for their superior biocompatibility compared with many other types nanomaterials. Moreover, one main reasons growing interest in graphene is its potential applications emerging technologies. Its key characteristics, including high electrical conductivity, excellent intrinsic charge carrier mobility, optical transparency, substantial specific surface area, and remarkable mechanical flexibility, position it an ideal candidate solar cells touch screens. durability further establishes strong contender developing robust materials. To date, variety methods, such traditional spectroscopic techniques chromatographic approaches, have been developed detecting biomolecules, drugs, heavy metals. Electrochemical portability, selectivity, impressive sensitivity, offer considerable convenience both patients professionals point-of-care diagnostics. Recent advancements significantly improved capacity rapid accurate detection analytes trace amounts, providing benefits biosensor technology. Additionally, integration nanotechnology has markedly enhanced sensitivity selectivity electrochemical sensors, yielding results. Innovations point-of-care, lab-on-a-chip, implantable devices, wearable sensors discussed this review. Graphical abstract

Язык: Английский

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