Recent Progress and Perspectives on Transition Metal-Based Electrocatalysts for Efficient Nitrate Reduction

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(8), P. 6701 - 6722

Published: April 8, 2024

Electrochemical nitrate reduction is the process of converting into ammonia or nitrogen using electric energy. This saves energy, protects environment, and an important technology for resource recovery water purification. paper examines recent advances in electrochemical research analyzes reaction mechanism path as well influence various factors on through thermodynamic kinetic principles. Second, catalytic performances transition metal electrocatalysts form single metals, alloys, oxides, composites are analyzed detail, which lays foundation rational development new, efficient, stable electrocatalysts. Finally, future directions prospects envisioned.

Language: Английский

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Advances in electrocatalytic nitrate reduction to ammonia over Cu-based catalysts

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121123 - 121123

Published: Feb. 1, 2025

Language: Английский

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Revealing the Tandem Behavior of Iron‐Group/Copper Binary Catalysts in the Electroreduction of Nitrate to Ammonia

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract As a green strategy for both ammonia (NH 3 ) production and wastewater purification, electrochemical reduction of nitrate (NO RR) faces challenges due to the nitrite 2 − accumulation competitive hydrogen evolution reaction (HER). Tandem catalysis NO NH offers great potential enhancing selectivity. Herein, iron‐group (Fe, Co, or Ni) nanosheets are introduced onto Cu nanowires construct Cu‐Fe, Cu‐Co, Cu‐Ni tandem systems respectively. Specifically, sites facilitate conversion . Fe sites, similar Cu, reduce , exacerbating rather than converting it their inability precisely capture Co exhibiting excellent moderate HER activity, can seamlessly operate with realize well‐ordered relay catalysis, which achieves superior yield rate 48.44 mg h −1 cm −2 Ni demonstrate removal capability at low overpotentials, leading Faraday efficiency 99.47%. However, its remarkable HER‐active property demonstrated via in situ polarization imaging makes challenge ampere‐level current densities. This work identifies behavior coupled providing reference design further optimization system.

Language: 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, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 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.

Language: Английский

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Enhancing Efficiency of Nitrate Reduction to Ammonia by Fe and Co Nanoparticles Based Bimetallic Electrocatalyst

Published: June 21, 2024

Green and sustainable electrocatalytic conversion of nitrogen-containing compounds to ammonia are currently in high demand order replace the eco-unfriendly Haber-Bosch process. Model catalysts for nitrate reduction reaction were obtained by electrodeposition metal Co, Fe bimetallic Fe/Co nanoparticles from aqueous solutions onto a graphite substrate. The samples characterized following methods: SEM, XRD, XPS, UV-vis spectroscopy, cyclic (and linear) voltammetry, chronoamperometry electrochemical impedance spectroscopy. Besides, determination electrochemically active surface was also performed all electrocatalysts. best electrocatalyst sample containing Fe-nanoparticles on layer Co-nanoparticles, which showed Faradaic efficiency 58.2% (E=-0.785 V vs. RHE) at yield rate 14.6 μmol h-1 cm-2. An opinion expressed elucidation mechanism coordinated action electrocatalyst. This work can serve primarily as starting point future investigations reactions using model proposed type.

Language: Английский

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Evidence for Distinct Active Sites on Oxide-Derived Cu for Electrochemical Nitrate Reduction

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(44), P. 30708 - 30714

Published: Oct. 23, 2024

Cu is a promising catalyst for electrochemical nitrate (NO

Language: Английский

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Alloy Catalysts for Electrochemical Nitrate Reduction to Ammonia

ChemElectroChem, Journal Year: 2025, Volume and Issue: 12(4)

Published: Jan. 31, 2025

Abstract Electrochemical nitrate reduction reaction (NO 3 − RR) represents a promising ammonia (NH ) production approach and has garnered significant attention in recent years. Owing to the highly tunable electronic structures physicochemical properties, alloy materials have emerged as efficient catalysts for electrochemical NO RR. This review systematically examines advancements including binary alloys multi‐metal RR, comprehensively analyzing their structure, catalytic activity, mechanisms In addition, relationship between catalysts′ composition, active sites, activity are described, aiming elucidate underlying principles high guide rational design of future catalysts. Finally, this addresses challenges proposes directions research development.

Language: Английский

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Intermetallic Compound and Solid Solutions of Co75Me25 (Me: Si, Fe, Cr) as Catalysts for the Electrochemical Reaction of Nitrate Conversion to Ammonia

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(4), P. 1650 - 1650

Published: Feb. 14, 2025

A sustainable reaction of electrocatalytic nitrate conversion in ammonia production (NO3RR) occurring under ambient conditions is currently prime interest, as well urgent research due to the real potential replacement environmentally unfavorable Haber-Bosch process. Herein, a series electrocatalysts based on two-component cobalt alloys was synthesized using low-cost non-noble metals Co, Fe, Cr, and also Si. The samples were characterized studied by following methods: SEM, EDX, XRD (both transmission reflection), UV-VIS spectroscopy, optical microscopy, linear (and cyclic) voltammetry, chronoamperometry, electrochemical impedance spectroscopy. Beyond that, determination electrochemically active surface area carried out for all electrocatalysts. Unexpectedly, sample having an intermetallic compound (IMC) composition Co2Si turned be most highly effective. highest Faradaic efficiency (FE) 80.8% at E = -0.585 V (RHE) yield rate 22.3 µmol h-1 cm-2 -0.685 indicate progressive role IMC main component electrocatalyst. Thus, this study demonstrates promise enormous efficient NO3RR. This work can serve primarily starting point future studies reactions catalysts containing metals.

Language: Английский

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Sustainable ammonia synthesis: opportunities for electrocatalytic nitrate reduction

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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The charge redistribution induced by Cu-Co bimetallic synergies efficiently promotes electrochemical reduction to ammonia

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162950 - 162950

Published: March 1, 2025

Language: Английский

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