Tandem Active Sites in Cu/Mo‐WO₃ Electrocatalysts for Efficient Electrocatalytic Nitrate Reduction to Ammonia

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Abstract Electrocatalytic NO 3 − reduction to NH is a promising technique for both ammonia synthesis and nitrate wastewater treatment. However, this conversion involves tandem processes of H 2 O dissociation hydrogenation, leading inferior Faraday efficiency (FE) yield rate. Herein, catalyst by anchoring atomically dispersed Cu species on Mo‐doped WO (Cu 5 /Mo 0.6 ‐WO ) the RR constructed, which achieves superior FE N 98.6% rate 26.25 mg h −1 cat at −0.7 V (vs RHE) in alkaline media, greatly exceeding performance Mo /WO counterparts. Systematic electrochemical measurement results reveal that promoted activation sites, accompanying accelerated water producing active hydrogens are responsible performance. In situ infrared spectroscopy theoretical calculation further demonstrate sites accelerate , dopant activates adjacent resulting decreased energy barrier * stepwise hydrogenation processes, making thermodynamically favorable. This work demonstrates critical role atomic level enhancing electrocatalytic paving feasible avenue developing high‐performance electrocatalysts.

Язык: Английский

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Bamboo-like amorphous Ni(OH)2 nanotubes wrapped Cu nanoparticles with a confined geometry for CO2 electroreduction to ethane in a flow cell

Science China Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 2, 2025

Язык: Английский

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Regulating Asymmetric C–C Coupling with Interfacial Alkalinity for Efficient CO₂ to C₂₊ Electroconversion

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Abstract The electrocatalytic reduction of CO 2 in neutral electrolytes is a promising avenue to minimize energy losses linked carbonate formation. However, selectivity for multi‐carbon (C 2+ ) products hampered by kinetic barriers C–C coupling. Here, the regulation asymmetric coupling achieved with interfacial alkalinity, facilitating efficient C electroconversion. This realized co‐engineering copper electrodes ZrO sites and CeO x enable favorable microenvironment that greatly boosts intrinsic catalytic activity. In situ spectroscopic results theoretical analyses demonstrates facilitates dissociation H O into *H *OH, effectively regulating coverage at interface promoting protonation *CO *COH. Meanwhile, significantly enhance adsorption situ‐produced optimize local pH on Cu surface, formation via low‐energy *OC–COH pathway. A notable electroconversion 1.0 M KCl electrolyte, Faraday efficiency 67.2 ± 2.1% partial current density 413.0 9.9 mA cm −2 achieved. synergistic enhancement hydroxyl stabilization interface, driven activation O, crucial boosting overall performance system.

Язык: Английский

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Progress in Cu‐Based Catalyst Design for Sustained Electrocatalytic CO₂ to C₂₊ Conversion

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Abstract The electrocatalytic conversion of CO 2 into valuable multi‐carbon (C 2+ ) products using Cu‐based catalysts has attracted significant attention. This review provides a comprehensive overview recent advances in catalyst design to improve C selectivity and operational stability. It begins with an analysis the fundamental reaction pathways for formation, encompassing both established emerging mechanisms, which offer critical insights design. In situ techniques, essential validating these by real‐time observation intermediates material evolution, are also introduced. A key focus this is placed on how enhance through manipulation, particularly emphasizing catalytic site construction promote C─C coupling via increasing * coverage optimizing protonation. Additionally, challenge maintaining activity under conditions discussed, highlighting reduction active charged Cu species materials reconstruction as major obstacles. To address these, describes strategies preserve sites control including novel utilization mitigation reconstruction. By presenting developments challenges ahead, aims guide future conversion.

Язык: Английский

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The Graphite-Phase Carbon Nitride/Silver Nanoclusters Nanocomposites Ratiometric Fluorescent Probe for Detection of Glutathione and Recognition of Cancer Cells

Опубликована: Янв. 1, 2025

Язык: Английский

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Cu-based Bimetallic Catalysts for Electrochemical CO2 Reduction: Before and Beyond the Tandem Effect

Nanoscale, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Cu-based bimetallic catalysts show enhanced electrochemical CO 2 reduction performance via the tandem effect. This review traces their progress, highlighting design advances, mechanisms, and challenges to guide efficient conversion.

Язык: Английский

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Controlling the Activity and Selectivity of Cu Catalysts toward Industrially Relevant Ethanol Electrosynthesis via High-Index Step Density Engineering

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Electrochemical CO2 reduction reaction on Cu catalysts can generate high-value multicarbon (C2+) products, making it a significant research area of growing commercial interest. However, the production rate ethanol remains low owing to trade-off between activity and selectivity catalysts. Here, we develop defect-rich catalyst with abundant high-index step sites by chemically etching commercially available nanoparticles. This exhibits high Faradaic efficiency ∼50% partial current density ∼416 mA cm-2 for production. Furthermore, shows good stability at total ∼800 cm-2, without obvious decay in selectivity. Control experiments indicate that impressive is closely associated steps present catalyst. In situ Raman spectroscopy functional theory calculations further verify optimal enable balanced adsorption *CO, *OH, *H, facilitate hydrogenation *CHCOH *CHCHOH, thereby improving work underscores importance control steering pathway toward ethanol.

Язык: Английский

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The graphite-phase carbon nitride/silver nanoclusters nanocomposites ratiometric fluorescent probe for detection of glutathione and recognition of cancer cells

Microchemical Journal, Год журнала: 2025, Номер unknown, С. 113706 - 113706

Опубликована: Апрель 1, 2025

Язык: Английский

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Highly Selective Oxidation of Benzene to Phenol Mediated by KHCO₃ in the Bimetallic Mo–Cu/NC-H₂O₂ System

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Although selective oxidation of benzene to phenol (SOBP) by H2O2 is an important chemical process, overoxidation the produced nonselective •OH during activation inevitably reduces selectivity. We, therefore, attempt mediate selectively using electrophilic KHCO3 in system. In this study, Mo-Cu/NC has been successfully synthesized via ball-milling bimetallic Mo-Cu and N-doped carbon, which exhibits high reactivity SOBP with a desirable yield 25.1% selectivity 100%. A series characterizations DFT calculations reveal that reaction between produces HCO4-, then moderately activated on Mo1Cu2/NC nonradical pathway formation Mo-(η2-O2) peroxo. Meanwhile, Ov at facilitates adsorption benzene, oxidized peroxo oxygen atom transfer pathway. This study provides new insights importance mediated H2O2-KHCO3 aromatic C-H bond

Язык: Английский

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