AuCu Nanodendrite for Enhancing Electrocatalytic Nitrate Reduction Applications via Two-stage Microfluidic Fabrication Strategy

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 1230 - 1241

Published: Jan. 7, 2025

The electrocatalytic nitrate reduction reaction (NitrRR) has attracted great attention in clean ammonia production, but it unsatisfactory selectivity and sluggish dynamics, owing to the complex eight-electron transfer process. While dendritic AuCu alloy is anticipated offer competitive performance, significant challenges remain terms of insufficient structural regulation an unelucidated enhancement mechanism because complexity involved its preparation. To address these issues, we have developed a two-stage microfluidic platform that facilitates stable fabrication controllable nano dendrites (NDs). Notably, Cu content resultant NDs reaches impressive 35.34 At%, surpassing traditional liquid-phase limitations. Furthermore, dendrite structure been thoroughly validated, revealing clear structure–activity relationship. By employing precise manipulation, determined optimal composition NDs, achieving remarkable yield 21.93 mg h–1 cm–2 faradic efficiency 93.30%. Additionally, DFT calculations further elucidate performance mechanism, showing Au3Cu1 sites significantly reduce energy barrier (0.28 eV) rate-determining step (RDS: *NO → *HNO), while excessive deposition adverse effect. Our work contributes innovative guidance for design high-performance electrocatalysts.

Language: Английский

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Synergistically constructing dual oxygen/sulfur vacancies and activating lattice oxygen in MoS2/TiO2 via heterointerface charge transfer for catalytic degradation of sulfur-containing VOCs

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160574 - 160574

Published: Feb. 1, 2025

Language: Английский

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Sulfur Defect Tuning of CuS/BiVO₄ and Understanding the Function of Hydrogen Radicals for Photoelectrochemical Ammonia Production

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

Published: Feb. 21, 2025

Photoelectrochemical nitrate reduction has been a promising method for ammonia (NH3) production under normal temperatures and neutral conditions. However, hydrogenation is key process in the selective of NH3 during reduction; therefore, inducing active hydrogen inhibiting are noteworthy problem. In this study, BiVO4/CuS (BVO/CS) heterostructure constructed photoelectrochemical reaction (PEC NIRR). The introduction CuS optimizes electron-transfer ability enhances surface catalytic kinetics BVO/CS. At same time, presence sulfur vacancies on promotes adsorption activation nitrate, realizes splitting H2O, successfully generates abundant radicals (H*). generated H* effectively utilized NIRR. yield selectivity optimal BVO/CS reach 30.55 μg h-1 cm-2 43.8%, respectively, which 2.65 2.39 times that bare BVO. Therefore, work determines role hydrogenation, providing novel strategy boosting PEC CuS/BiVO4 was fabricated reduction. Sulfur defects enabled generation radicals, promoted production.

Language: Английский

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Efficient Nitrate Reduction Electrocatalyst Was Designed by Identifying and Optimizing the Active Site of Fe3o4

Published: Jan. 1, 2025

Language: Английский

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Phosphorus‐Modulated Cobalt Nanosheets with Confined Metal Defects for Enhanced Kinetics in Nitrite‐Glycerol Co‐Electrolysis

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

Published: March 27, 2025

Abstract Exploring advanced electrocatalysts for the paired electrolysis of nitrite reduction reaction (NO 2 RR) and glycerol oxidation (GOR) is significance co‐production value‐added chemicals, but remains a great challenge. Herein, novel phosphorus‐modulated cobalt nanosheet with low‐coordination metallic sites (P 3 ‐Co) developed as an electrocatalyst efficient nitrite‐glycerol co‐electrolysis. The membrane electrode assembled NO RR‖GOR electrolyzer realizes promising operation performance high Faradaic efficiencies yields NH (98.2%, 29.3 mg h −1 cm −2 ) formate (93.4%, 85.7 at 1.5 V, well superior catalytic stability over long‐term 300 100 mA . in situ characterizations theoretical calculations are employed to reveal origin intrinsic activity P ‐Co, suggesting that metal Co defects P‐modulation beneficial optimizing electronic structure adsorption/activation barriers N‐containing intermediates accelerated conversion kinetics both GOR RR. This work offers guidance exploiting highly‐active generation high‐value‐added products.

Language: Английский

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Design of an Efficient Nitrate Reduction Electrocatalyst via Active Site Identification and Optimization in Fe3O4

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 492, P. 138228 - 138228

Published: April 11, 2025

Language: Английский

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Expediting Industrial Electrochemical Nitrate‐to‐Ammonia via a Heterogeneous Trap Architecture‐Driven Microconvection Catalyst With Enhanced NH₃/Heat Gradient

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

Published: April 15, 2025

Abstract In this work, we report a heterogeneous trap architecture‐driven microconvection catalyst with enhanced NH 3 /heat gradient enabled by designing built‐in double heterostructure of Ni‐Bi‐S catalytic layer intrinsic ammonia/heat combining 3D inverted biomimetic mushroom (IBM) lattice structure effect‐driven gradient. The crystal Bi 2 S /amorphous Ni compared can effectively low the binding energy between electron and orbit, enhance transfer ability, generate more charge accumulation at junctions within heterostructures, slow *H release hydrolysis couple process, accelerate consumption nitrate reduction reduce ‐formation free barrier produce molecular ammonia, thereby forming ammonia heat inside layer. Besides, is conducive to formation higher irradiation gradient, on surface, stronger thermal/NH convection. Notably, as‐prepared electrocatalyst achieve high yield 4.87 mmol −1 h cm −2 in ultra‐low polarization potential ‐0.17V (vs Reversible Hydrogen Electrode (RHE)) industrial 800 mA/cm current density under electric‐light field condition, highest improvement rate reach 44.5%, saving up 27.8% pure electric conditions.

Language: Английский

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Cu₃P/CoP Heterostructure for Efficient Electrosynthesis of Ammonia from Nitrate Reduction Reaction

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Electrocatalytic nitrate reduction (ENO

Language: Английский

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