Recent advances in electrochemical cathodic nitrogen oxide reduction coupled with thermodynamically favorable anodic oxidation

Nano Energy, Год журнала: 2025, Номер unknown, С. 110939 - 110939

Опубликована: Апрель 1, 2025

Язык: Английский

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Copper–Nickel Bimetallic-Doped Nanospinel for Efficient Electrochemical Reduction of NO to NH₃

ACS Applied Nano Materials, Год журнала: 2025, Номер 8(4), С. 1806 - 1815

Опубликована: Янв. 17, 2025

Electrocatalytic reduction of nitric oxide (eNORR) represents a promising and sustainable resource strategy. The process is effective at both mitigating anthropogenic air pollution producing ammonia (NH3) in manner that environmentally reliant on renewable energy sources. In this study, series Cu, Ni metal A-site doped nanospinel composites CuxNi1–xCo2O4 (x = 0, 0.5, 0.9, 1) were synthesized as highly efficient electrocatalysts for NO reduction. experimental results catalytic activity showed Cu0.5Ni0.5Co2O4 exhibited maximum Faraday efficiency (FE) 92.73% −0.9 V vs reversible hydrogen electrode (vs RHE), with NH3 production rate 99.12 mmol g–1 h–1 room temperature. Microscopic characterization indicated the distinctive nanorod structure effectively increased surface area, promoted electron/ion transport, exposed more active sites. X-ray photoelectron spectroscopy (XPS) demonstrated interaction between metals could enhance charge transfer inhibit evolution reaction (HER). theoretical analysis comprehensively enhanced was primarily attributed to incorporation Cu doping, which facilitated modification electronic NiCo2O4. Furthermore, synergistic effect sites significantly stable adsorption intermediate *NHO catalyst surface. This work offers guidance facilitates friendly synthesis design spinel catalysts exhibiting superior performance.

Язык: Английский

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Electrosynthesis of NH3 from low-concentration NO on cascade dual-site catalysts in neutral media

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Electrosynthesis of NH₃ from low-concentration NO (NORR) in neutral media offers a sustainable nitrogen fixation strategy but is hindered by weak adsorption, slow water dissociation, and sluggish hydrogenation kinetics. Herein, we propose new that successfully overcomes these limitations through using an electron-donating motif to modulate NO-affinitive catalysts, thereby creating dual active site with synergistic functionality. Specifically, integrate nanoparticles into Fe single-atom catalyst (Fe_SAC), where sites ensure strong while motifs promote dissociation hydrogenation. In situ X-ray absorption spectroscopy (XAS), in attenuated total reflection-infrared (ATR-IR), theoretical calculations reveal increase electron density, strengthening adsorption. Additionally, also supplying protons lower the barrier. This interplay enables cascade reaction mechanism, delivering remarkable Faradaic efficiency (FE) 90.3% yield rate 709.7 µg h^{− 1} mg_cat.⁻¹ under 1.0 vol% media, outperforming pure Fe_SAC (NH₃ rate: 444.2 mg_cat.⁻¹, FE: 56.6%) prior high-NO-concentration systems. Notably, record 3123.8 was achieved membrane electrode assembly (MEA) electrolyzer NO. work establishes paradigm NORR simultaneously enhancing kinetics, providing scalable route for efficient electrosynthesis dilute sources.

Язык: Английский

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Electrocatalytic N–H bond transformations: a zero-carbon paradigm for sustainable energy storage and conversion

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Electrocatalytic zero-carbon energy systems based on the N–H bond have achieved a complete cycle of storage and conversion, providing guidance for application clean conversion.

Язык: Английский

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Graphene Oxide-Anchored Cu–Co Catalysts for Efficient Electrochemical Nitrate Reduction

Materials, Год журнала: 2025, Номер 18(11), С. 2495 - 2495

Опубликована: Май 26, 2025

Electrocatalytic nitrate reduction to ammonia (ENRA) presents a promising strategy for simultaneous environmental remediation and sustainable synthesis. In this work, Cu–Co bimetallic catalyst supported on functionalized reduced graphene oxide (RGO) was systematically designed achieve efficient selective production. Surface oxygen functional groups (GO) were optimized through alkaline hydrothermal treatments, enhancing the anchoring capacity metal active sites. Characterization indicated successful formation of uniform heterointerfaces comprising metallic phases, which significantly improved stability performance. Among studied compositions, Cu6Co4/RGO exhibited superior catalytic activity, achieving remarkable selectivity 99.86% Faradaic efficiency 96.54% at −0.6 V (vs. RHE). Long-term electrocatalysis demonstrated excellent durability, with over 90% maintained production after 20 h operation. situ FTIR analysis revealed that introducing Co effectively promoted water dissociation, facilitating hydrogen generation (*H) accelerating transformation intermediates. This work offers valuable mechanistic insights paves way design highly electrocatalysts electrosynthesis.

Язык: Английский

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