Construction of a Heterostructured Alloy–Molybdenum Nitride Catalyst for Enhanced NH₃ Production via Nitrate Electrolysis

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Here, we reported a highly efficient nitrate electroreduction (NO3RR) electrocatalyst that integrated alloying and heterostructuring strategies comprising FeCo alloy Mo0.82N (FeCo-Mo0.82N/NC). Notably, the maximum NH3 Faraday efficiency (FE) of 83.24%, yield 12.28 mg h-1 mgcat.-1, good stability were achieved over FeCo-Mo0.82N/NC. Moreover, Zn-NO3- battery assembled with FeCo-Mo0.82N/NC exhibited power density 0.87 mW cm-2, an 14.09 FE as high 76.31%.

Language: Английский

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Hollow Square Ni-Doped Copper Oxide Catalyst Boosting Electrocatalytic Nitrate Reduction

ACS Catalysis, Journal Year: 2025, Volume and Issue: 15(3), P. 1672 - 1683

Published: Jan. 16, 2025

The electrochemical nitrate reduction reaction to ammonia (NRA) is gaining increasing attention as an eco-friendly approach convert harmful pollutants into high-value product ammonia. NRA involves two critical rate-determining steps: hydrogenation of the *NO and *NOH intermediates. composite Ni Cu has been demonstrated exhibit synergistic catalytic effects; however, research on combination CuO remains limited. Herein, advanced Ni-doped copper oxide catalyst with a hollow square morphology (Ni–CuO) reported Faradaic efficiency 95.26% at −0.8 V vs RHE high yield rate 0.94 mmol h–1 cm–2, demonstrating selectivity stability. Complementary analyses that active hydrogen generated sites facilitates *NOx adsorbed sites. Theoretical computations further confirm thermodynamic viability this bimetallic mechanism. Furthermore, Al–NO3– battery open-circuit voltage was constructed by using Ni–CuO cathode. This work presents synergistically modulated for complex processes introduces highly efficient capable simultaneous NH3 synthesis electrical energy conversion, underscoring its potential in catalysis development chemical industries.

Language: Английский

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High-performance asymmetric supercapacitors based on 2D MXene/NiCoP hybrid and ZIF derived porous nanocarbon

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Enhanced Electrocatalytic Urea Synthesis over Iron-Doped InOOH Nanosheets under Ambient Conditions

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(44), P. 20935 - 20939

Published: Oct. 25, 2024

Ambient urea synthesis via C–N coupling from CO2 and nitrate reduction offers an attractive alternative to the Bosch-Meiser route, but it is hindered by lack of efficient catalysts. Herein, we report that Fe-doped InOOH nanosheets effectively catalyze coreduction nitrate, giving a high Faradaic Efficiency 26.9%, yield rate 980.6 μg h–1 mgcat.–1, good durability. Theoretical calculations further elucidate iron dopants can tailor reactivity In site, facilitating hydrogenation key *CO2NH2 intermediate suppressing hydrogen production with higher energy barrier.

Language: Английский

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Advancements in Amorphous Oxides for Electrocatalytic Carbon Dioxide Reduction

Materials Today Catalysis, Journal Year: 2024, Volume and Issue: unknown, P. 100065 - 100065

Published: Sept. 1, 2024

Language: Английский

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Activating the Basal Planes of Ti₂C MXene for Accelerated Ammonia Electrosynthesis: Role of Surface Terminations

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Altering the edge sites of 2D MXenes for electrochemical dinitrogen reduction reaction (ENRR) is widely reported, whereas activation its relatively inert basal planes neglected. Herein, and optimization Ti 2 CT x (T = *F, *O, *OH) toward enhanced ENRR to ammonia reported. The balanced surface functionalization in regulates kinetics by regulating potential zero charge (E PZC ) work function (). Specifically, altered E enhances electric field localization screening at /water interface stabilizing transition state reducing energy (ΔE). Hydrodynamic voltammetry, situ Raman, post‐ENRR X‐ray spectroscopy suggest faster kinetics, via an associative distal pathway, with *OH *F terminated 3+ as dominant active over surface. achieves yield 35.2 Faradaic efficiency 5.9% 0.05 m H SO 4 , which further improves 49% 0.5 NaBF . strategy concurrently modulates via, proton‐repelling functional groups (*F) on electrode weak proton donor electrolytes (NaBF ). This suppresses HER minimizes competition sites, promotes selective nitrogen activation, thereby boosting efficiency.

Language: Английский

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Ab Initio Study of a Tandem PdCu Catalyst Supported on Carbon Nitride Nanosheets for Nitrate-to-Ammonia Electrochemical Reduction

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1709 - 1717

Published: Jan. 15, 2025

Electrochemical conversion of nitrate offers an efficient approach to mitigate pollution and ammonia synthesis but is still challenged by the slow kinetics selectivity issues active sites. Herein, performing density functional theory (DFT) calculations, we report a double-atom catalyst PdCu–C7N6 incorporating Pd Cu together embedded in C7N6 frameworks, which not only shows outstanding catalytic performance with low limiting potential 0.36 V, also can effectively inhibit competing hydrogen evolution reactions. The high NO3RR activity on well explained polarizable bond length as asymmetric charge distribution Pd–Cu dual This DFT work opens avenue for developing highly multicomponent electrocatalysts.

Language: Английский

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Efficient Nitrate to Ammonia Conversion on Bifunctional IrCu₄ Alloy Nanoparticles

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 18, 2025

Electrochemical nitrate reduction (NO3RR) to ammonia presents a promising alternative strategy the traditional Haber-Bosch process. However, competitive hydrogen evolution reaction (HER) reduces Faradaic efficiency toward ammonia, while oxygen (OER) increases energy consumption. This study designs IrCu4 alloy nanoparticles as bifunctional catalyst achieve efficient NO3RR and OER suppressing unwanted HER. is achieved by operating at positive potentials using catalyst, which allows of 93.6% for NO3RR. When applied catalysis, also shows excellent results, with relatively low overpotential 260 mV 10 mA cm-2. Stable production can be 50 h in 16 cm2 flow electrolyzer simulated working conditions. Our research provides pathway optimizing through catalysts tandem approach.

Language: Английский

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Highly graphitized nitrogen-doped ordered mesoporous carbon supported Ni nanocrystals for efficient hydrazine-assisted CO2 splitting

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

An efficient nanoscale Ni-based catalyst enabled the energy-efficient coupling of HzOR with CO 2 RR for production.

Language: Английский

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Green Ammonia Unleashed: Cutting-Edge Electrochemical Synthesis, Catalyst Innovations, and SOFC Integration for a Sustainable Energy Future─A Review and Perspectives

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Green ammonia emerges as an important candidate for the transition toward sustainable energy solutions to address global imperative carbon neutrality. The current review explores electrochemical synthesis of and its integration into Solid Oxide Fuel Cells (SOFCs) while also challenging traditional method, known substantial consumption considerable footprint. specific advances covered in this article include lithium cycling, electromagnetic fields, plasma technology used ammonia. Innovations have resulted from development efficient single-atom, transition-metal- alloy-based bismuth-based catalysts. In background, paper analyzes advancements made application within SOFCs, emphasizing advancement nickel-based catalysts decomposition technologies that improve both efficiency durability these systems operational settings. This presents a compelling perspective on their potential critical challenges storage, emissions reduction, low-carbon future.

Language: Английский

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