Surface Structure Reformulation from CuO to Cu/Cu(OH)₂ for Highly Efficient Nitrate Reduction to Ammonia

Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)

Published: Aug. 9, 2024

Abstract Electrochemical conversion of nitrate (NO 3 − ) to ammonia (NH is a potential way produce green NH and remediate the nitrogen cycle. In this paper, an efficient catalyst spherical CuO made by stacking small particles with oxygen‐rich vacancies reported. The yield Faraday efficiency are 15.53 mg h −1 cat 90.69%, respectively, in neutral electrolyte at voltage ‐0.80 V (vs. reversible hydrogen electrode). high activity electrodes results from changes phase structure during electrochemical reduction. Structurally, there shift dense accumulation layered network uniform distribution stacked on top each other, thus exposing more active sites. Furthermore, terms phase, electrode transitions Cu/Cu(OH) 2 . Density functional theory calculations showed that Cu(OH) formation enhances NO ‐ adsorption. Meanwhile, can inhibit competing evolution reaction, while Cu (111) crystal surfaces facilitates hydrogenation reaction. synergistic effect between two promotes Therefore, study provides new idea direction for Cu‐based oxides electrocatalytic production.

Language: Английский

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Enhanced activation of molecular oxygen for efficient chloroquine phosphate degradation with CuO@Co3O4/GF heterostructure: Promoting mechanisms of oxygen vacancy and interfacial electronic engineering

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131745 - 131745

Published: Jan. 1, 2025

Language: Английский

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Endowing Cu-Based Oxide with a Self-Healing Feature via High-Entropy Doping toward Ampere-Level Electrochemical Nitrate Reduction to Ammonia

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 938 - 946

Published: Feb. 10, 2025

Language: Английский

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Preparation of Copper Oxide Film at Low Temperature in Basic Conditions on a Copper Substrate

Materials, Journal Year: 2025, Volume and Issue: 18(7), P. 1487 - 1487

Published: March 26, 2025

Copper is widely used in both its metallic form and as oxide across numerous scientific industrial domains. The primary copper oxides, cuprite (Cu2O) tenorite (CuO), naturally on the surface play a crucial role advanced technologies, such solar cells, lithium batteries, sensors. Tenorite appreciated for optical properties, stability, low toxicity, reactivity. While thin films are traditionally synthesized through thermal treatments oxidation alkaline environments, these conventional high-temperature methods not only require significant energy consumption but can also compromise metal-film interface. This study aims to develop sustainable alternative approach forming homogeneous CuO layer substrate environmentally friendly based temperature, cost-effective, time-saving procedures. Three different eco-conscious were investigated: (i) immersion NaOH basic solution, (ii) exposure solution vapours, (iii) combined treatment involving vapour exposure. green synthesis significantly reduces compared traditional while maintaining product quality. was investigated an microscope (OM), scanning electron microscopy (SEM), spectrocolorimetric analysis, peel-off test, µ-Raman X-ray photoelectron spectroscopy (XPS) analysis investigate state.

Language: Английский

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Hydrogen Spillover Mediated Nitrite Hydrogenation for Ultralow-Potential Ammonia Electrosynthesis over Platinum Nanoparticles Anchored on Cu Hydroxide Nanowires

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125435 - 125435

Published: May 1, 2025

Language: Английский

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Cu‐Ru Bicenter Synergistically Triggers Tandem Catalytic Effect for Electroreduction of Nitrate to Ammonium

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

Published: Jan. 10, 2025

Abstract The electrochemical transformation of nitrate (NO 3 − ) into ammonia (NH holds significant promise to addresses nitration contamination and offers a sustainable alternative the Haber–Bosch process. However, sluggish kinetics hinders its large‐scale application. Herein, Cu‐doped SrRuO synergetic tandem catalyst is designed synthesized, which demonstrates exceptional performance in converting NO NH . Specifically, this achieves maximum Faradaic efficiency 95.4% for production, along with high yield rate 7196 µg h −1 mg cat. A series detailed characterizations reveals that doped Cu ions modify local electronic environment Ru 4 d e g orbital , thereby facilitating highly efficient electron transfer processes. In situ delta X‐ray absorption near‐edge structure (ΔXANES), synchrotron radiation‐based Fourier transform infrared (SR‐FTIR) Raman spectroscopy identified * 2 generated on active sites subsequently hydrogenated sites. Combined theoretical studies, it confirmed significantly reduces energy barriers rate‐determining step ( NOH), enhancing synthesis. This work not only fundamental insights mechanisms cation substitution regulating perovskite catalysts, but also provides promising avenue electro‐synthesis ammonia.

Language: Английский

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Metastable Phase Noble-Metal-Free Core–Shell Structure for Efficient Electrocatalytic Nitrobenzene Transfer Hydrogenation

Nano Letters, Journal Year: 2025, Volume and Issue: 25(9), P. 3383 - 3390

Published: Feb. 19, 2025

In order to study the catalytic behavior of a metastable-phase catalyst in electrocatalytic hydrogenation, we report new noble-metal-free core–shell with metastable hexagonal closest packed (hcp) phase Ni as shell and face-centered-cubic (fcc) Cu core (Cu@hcp NPs) for hydrogenation nitrobenzene (Ph-NO2) aniline (Ph-NH2). Using H2O hydrogen source, it achieves up 99.63% Ph-NO2 conversion ∼100% Ph-NH2 selectivity, an improved activity turnover frequency (TOF: 6640 h–1), much higher than those hcp NPs (5183.7 h–1) commercial Pt/C (3537.6 h–1). It can also deliver variety aminoarenes outstanding selectivity excellent functional group compatibility several groups. Mechanistic studies have shown that introduction enhances Ni's ability dissociate water situ produce H* improves rate, resulting rapid final product Ph-NH2.

Language: Английский

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Ambient and Selective Electrochemical Dinitrogen Fixation to NH₃ Catalyzed by Microporous Organic–Inorganic Hybrid Copper Phosphonate

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 9, 2025

Language: Английский

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Hydrogen radical-mediated efficient electrocatalytic N2 reduction by bimetallic sulfides

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162736 - 162736

Published: April 1, 2025

Language: Английский

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Construction of Fe3O4@Au catalysts via the surface functional group effect of ferric oxide for efficient electrocatalytic nitrite reduction

Dalton Transactions, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Surface modification is one of the effective strategies to control morphology and electrocatalytic performance noble metal/transition metal oxide matrix composite catalysts. In this work, we successfully introduced groups such as -NH

Language: Английский

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