Unveiling Cutting‐Edge Developments in Electrocatalytic Nitrate‐to‐Ammonia Conversion

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 11, 2024

The excessive enrichment of nitrate in the environment can be converted into ammonia (NH

Язык: Английский

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Charge‐Transfer Complexes: Fundamentals and Advances in Catalysis, Sensing, and Optoelectronic Applications

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 24, 2024

Abstract Supramolecular assemblies, formed through electronic charge transfer between two or more entities, represent a rich class of compounds dubbed as charge‐transfer complexes (CTCs). Their distinctive formation pathway, rooted in processes at the interface CTC‐forming components, results delocalization along molecular stacks, rendering CTCs intrinsic conductors. Since discovery CTCs, intensive research has explored their unique properties including magnetism, conductivity, and superconductivity. recently recognized semiconducting functionality inspired recent developments applications requiring organic semiconductors. In this context, offer tuneable energy gap, charge‐transport properties, tailorable physicochemical interactions, photoresponsiveness, potential for scalable manufacturing. Here, an updated viewpoint on is provided, presenting them emerging To end, chemical alongside synthesis methods are reviewed. The that benefit various related realms optoelectronics, catalysts, gas sensors discussed. Insights future existing limitations described.

Язык: Английский

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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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Controlling electrocatalytic nitrate reduction efficiency by utilizing dπ–pπ interactions in parallel stacking molecular systems

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

The orientation of β-CuPc favours the overlap central Cu with N parallel molecules, which is reason behind high electrical conductivity and selectivity in NH 3 production via nitrate reduction, impossible other polymorphs.

Язык: Английский

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Enhancing Electrochemical Reactivity with Magnetic Fields: Unraveling the Role of Magneto‐Electrochemistry

Small Methods, Год журнала: 2024, Номер 8(7)

Опубликована: Янв. 14, 2024

Abstract Electrocatalysis performs a vital role in numerous energy transformation and repository mechanics, including power cells, Electric field‐assisted catalysis, batteries. It is crucial to investigate new methods improve electrocatalytic performance if effective long‐lasting systems are developed. The modulation of catalytic activity selectivity by external magnetic fields over electrochemical processes has received lot interest lately. How the use various electrocatalysis great promise for building selective catalysts, opening door advancement sophisticated conversion discussed. Furthermore, challenges possibilities incorporating into suggestions future research areas

Язык: Английский

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Boosting nitrate electroreduction to ammonia on atomic Ru-Co pair sites in hollow spinels

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 358, С. 124387 - 124387

Опубликована: Июль 9, 2024

Язык: Английский

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Cu–Bi Bimetallic Catalysts Derived from Metal–Organic Framework Arrays on Copper Foam for Efficient Glycine Electrosynthesis

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Сен. 30, 2024

Abstract Glycine as one of the most abundant amino acids in human proteins, with extensive applications both life and industry, is conventionally synthesized through complex procedures or toxic feedstocks. In this study, we present a facile benign electrochemical pathway for synthesis glycine reductive coupling glyoxylic acid nitrate over copper‐bismuth bimetal catalyst derived from metal–organic framework (MOF) array on copper foam (Cu/Bi−C@CF). Remarkably, Cu/Bi−C@CF achieves fantastic selectivity 89 %, corresponding high Faraday efficiency 65.9 %. From control experiments, introduction Bi caused binding energy Cu shift to lower state, which leads towards formation key intermediate hydroxylamine rather than ammonia product, facilitating oxime providing additional sites subsequent hydrogenation reaction way glycine. Moreover, derivation MOF arrays ensures effective dispersion enhances stability Cu/Bi−C@CF. This innovative approach not only presents sustainable pathways production value‐added organonitrogen compounds utilizing readily available carbon nitrogen sources, but also provides novel insights into design multistage structural catalysts sequential reactions.

Язык: Английский

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In Situ Spectroscopic Probing of the Hydroxylamine Pathway of Electrocatalytic Nitrate Reduction on Iron‐Oxy‐Hydroxide

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Abstract Crystalline γ‐FeO(OH) dominantly possessing ─ OH terminals (𝛾‐FeO(OH) c ), polycrystalline containing multiple O, OH, and Fe pc α‐Fe 2 O 3 majorly surface are used as electrocatalysts to study the effect of on electrocatalytic nitrate reduction reaction (eNO RR) selectivity stabilization intermediates. Brunauer‐Emmett‐Teller analysis electrochemically determined area suggest a high active 117.79 m g −1 (ECSA: 0.211 cm ) for 𝛾‐FeO(OH) maximizing accessibility adsorption exhibiting selective eNO RR NH at pH 7 with yield rate 18.326 mg h −2 , >85% Faradaic efficiency (FE), least nine‐times catalyst‐recyclability. 15 N‐ D‐labeling combined in situ IR Raman studies validate ions generation nitrite hydroxyl amine A kinetic isotope (KIE) value 2.1 indicates H proton source proton‐coupled electron transfer rate‐limiting step. The rotating‐ring disk electrochemical (RRDE) subsequent Koutecký‐Levich reveal electron‐transfer constant (k) 2e‐ is 5.7 × 10 −6 s . This provides direct evidence formation dominant pathway γ‐FeO(OH).

Язык: Английский

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FeIr Alloy Optimizes the Trade‐Off Between Nitrate Reduction and Active Hydrogen Generation for Efficient Electro‐Synthesis of Ammonia in Neutral Media

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Abstract Electrochemically promoted nitrate reduction reaction (NITRR) holds great potential for the “green” synthesis of ammonia (NH 3 ). However, NITRR in neutral media, though close to practical scenario, is often limited by an insufficient supply active hydrogen (*H) due sluggish water cleavage. In this work, it demonstrated that a bimetallic alloy FeIr can optimize trade‐off between and *H formation media. As result, exhibits excellent catalytic performance toward with Faradaic efficiency NH up 97.3% high yield rate 11.67 mg h −1 cm −2 at low working −0.6 V (versus reversible electrode (RHE)), surpassing monometallic catalysts as well majority Fe‐based state‐of‐the‐art. It also found displays remarkable electron rearrangement hetero‐atoms their significant orbital hybridization, which benefits not only but process. Moreover, coupling FeIr‐based methanol oxidation (MOR) results sustainable productions formate combined FE nearly 200% cell‐voltage 2 V. This work thus demonstrates promising strategy designing efficient NITRR.

Язык: Английский

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Hollow PdCuCo medium-entropy alloy on reduced graphene oxide with proton-mediator boosted tandem catalysis for high-performance nitrate reduction

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 361, С. 124609 - 124609

Опубликована: Сен. 16, 2024

Язык: Английский

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