Selective Nitrate Electroreduction to Ammonia on CNT Electrodes with Controllable Interfacial Wettability

Environmental Science & Technology, Год журнала: 2024, Номер 58(16), С. 7228 - 7236

Опубликована: Март 29, 2024

The development of electrocatalysts that can efficiently reduce nitrate (NO

Язык: Английский

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Boron‐Doped Ti₃C₂T_x MXene for Effective and Durable High‐Current‐Density Ammonia Synthesis

Small, Год журнала: 2024, Номер 20(45)

Опубликована: Июль 24, 2024

Abstract Ammonia (NH 3 ) synthesis via the nitrate reduction reaction (NO RR) offers a competitive strategy for nitrogen cycling and carbon neutrality; however, this is hindered by poor NO RR performance under high current density. Herein, it shown that boron‐doped Ti C 2 T x MXene nanosheets can highly efficiently catalyze conversion of RR‐to‐NH at ambient conditions, showing maximal NH Faradic efficiency 91% with peak yield rate 26.2 mgh −1 mg cat. , robust durability over ten consecutive cycles, all them are comparable to best‐reported results exceed those pristine MXene. More importantly, when tested in flow cell, designed catalyst delivers density ‒1000 mA cm −2 low potential ‒1.18 V versus reversible hydrogen electrode maintains selectivity wide range. Besides, Zn–nitrate battery as cathode assembled, which achieves power 5.24 mW 1.15 . Theoretical simulations further demonstrate boron dopants optimize adsorption activation intermediates, reduce potential‐determining step barrier, thus leading an enhanced selectivity.

Язык: Английский

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Co nanoparticle-decorated radix cynanchi daniculati-derived carbon for efficient electrocatalytic nitrite reduction to ammonia

Catalysis Science & Technology, Год журнала: 2024, Номер 14(11), С. 3007 - 3011

Опубликована: Янв. 1, 2024

As an efficient catalyst for NH 3 production via NO 2 − reduction, Co nanoparticles decorated radix cynanchi paniculati-derived carbon exhibits a high faradaic efficiency of 92.77% with yield 1235.62 μmol h −1 cm −2 at −0.8 V.

Язык: Английский

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Efficiently unbiased solar-to-ammonia conversion by photoelectrochemical Cu/C/Si-TiO2 tandems

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 345, С. 123735 - 123735

Опубликована: Янв. 15, 2024

Язык: Английский

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Recent progress in the advanced strategies, rational design, and engineering of electrocatalysts for nitrate reduction toward ammonia

Physical Chemistry Chemical Physics, Год журнала: 2024, Номер 26(15), С. 11208 - 11216

Опубликована: Янв. 1, 2024

Electrocatalytic nitrate reduction to ammonia offers a sustainable pathway for the synthesis of ammonia, its modular design and versatility make it suitable addressing environmental pollution nitrogen management.

Язык: Английский

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Modulation strategies of electrocatalysts for 5-hydroxymethylfurfural oxidation-assisted water splitting

Microstructures, Год журнала: 2024, Номер 4(3)

Опубликована: Июль 24, 2024

To address energy shortages and environmental issues, prioritizing renewable development usage is crucial. Employing sources for water electrolysis offers a sustainable method hydrogen generation. Reducing the potential vital efficient clean conversion storage. Substituting anodic oxygen evolution reaction in conventional production from with more thermodynamically favorable 5-hydroxymethylfurfural (HMF) oxidation can greatly decrease overpotential yield valuable product 2,5-furan dicarboxylic acid. The key to this process developing effective electrocatalysts minimize of HMF electrooxidation-hydrogen system. Therefore, review provides comprehensive introduction modulation strategies that affect electronic geometric structure oxidation-assisted splitting. encompass heteroatom doping, defect projection, interface engineering, structural design, multi-metal synergies. catalysts are assessed various angles, encompassing characterization, mechanisms, electrochemical performance. Finally, current challenges catalyst design promising field proposed.

Язык: Английский

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Nickel Nanoparticles Confined in Core–Shell Derived from Covalent Organic Framework for the Efficient Electrocatalytic NO Reduction to NH₃

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(6), С. 2514 - 2523

Опубликована: Март 4, 2024

The electrocatalytic nitric oxide reduction reaction (NORR) has attracted significant attention as an ecofriendly alternative to the conventional Haber–Bosch process for producing ammonia (NH3). However, poor selectivity NH3 and low catalyst stability under harsh conditions are great challenges in NORR. Herein, core–shell structure of nickel nanoparticles enclosed with a nitrogen-doped carbon layer (Ni@NC) electrocatalyst derived from covalent organic frameworks is employed high performance Ni@NC-700 achieved highest FENH3 82.94% yield rate 19.00 μmol cm–2 h–1 at 0.16 V (vs reversible hydrogen electrode) 0.1 M HClO4 electrolyte. Control experiments revealed that (Ni NPs) acted active centers Ni@NC efficient production NH3. ideal shell protection Ni NPs inherent catalytic TOF promising candidate NORR electrocatalyst. test demonstrated remarkable Ni@NC. were protected by nanostructures resembling catalysts, preventing metal dissolution during rough electrolysis.

Язык: Английский

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High-efficiency ammonia synthesis via electrochemical nitrate reduction over Co₃O₄ nanoarrays by B doping

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(8), С. 2339 - 2345

Опубликована: Янв. 1, 2024

B acts as an effective dopant to boost the catalytic activity of Co 3 O 4 for nitrate reduction reaction towards NH synthesis. Such B-Co /TM achieves a high faradaic efficiency 94.7% and large yield rate 407.3 μmol h −1 cm −2 .

Язык: Английский

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Pathway toward Scalable Energy-Efficient Li-Mediated Ammonia Synthesis

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(13), С. 16203 - 16212

Опубликована: Март 20, 2024

Lithium-mediated ammonia synthesis (LiMAS) is an emerging electrochemical method for NH3 production, featuring a meticulous three-step process involving Li+ electrodeposition, Li nitridation, and Li3N protolysis. The essence lies in the electrodeposition of Li+, critical phase demanding current oscillations to fortify solid-electrolyte interface (SEI) ensure voltage stability. This distinctive operational cadence orchestrates nitridation protolysis, profoundly influencing selectivity. Increasing N2 pressure enhances faradaic efficiency (FE) up 20 bar, beyond which proton availability controls selectivity between donor, typically alcohols, key factor, with 1-butanol observed yield highest FE. Counterion salt also be significant, larger anions (e.g., exemplified by BF4–) improving SEI stability, directly impacting LiMAS efficacy. Notably, we report peak FE ∼70% density ∼−100 mA/cm2 via delicate balance conditions, encompassing pressure, salt, their respective concentrations. In contrast recent literature, find that theoretical maximum energy hinges significantly on source, utilizing H2O calculated have achievable 27.8%. Despite inherent challenges, technoeconomic analysis suggests high-pressure more feasible than both ambient modified green Haber–Bosch process. Our finds that, at 100 6 V cell voltage, delivers all-inclusive cost $456 per ton, lower conventional barriers. economic underscores as potentially transformative technology may revolutionize large-scale paving way sustainable future.

Язык: Английский

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Efficient electrocatalytic nitrate reduction on molecular catalyst with electron-deficient single-atom Cuδ+ sites

Chemical Engineering Journal, Год журнала: 2024, Номер 495, С. 153427 - 153427

Опубликована: Июнь 22, 2024

Язык: Английский

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