Ag-Ni(OH)2/Cu Heterostructure for Tandem Electrocatalytic Nitrate Reduction to Ammonia Coupled with 5-Hydroxymethylfurfural Electrooxidation DOI
Xue Chen,

Yuexuan He,

Guopeng Ding

et al.

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

Published: June 3, 2025

Electrochemical reduction of nitrate ions to NH3 provides a sustainable route for both synthesis and wastewater treatment, but it remains challenging. Here we report Ag-Ni(OH)2/Cu NW heterostructure that exhibits high Faraday efficiency 97.3% with an yield rate 4.01 mg h-1 cm-2 at -0.1 V vs RHE. Theoretical studies reveal the excellent performance results from multisite synergy via cascade electrocatalysis, in which Ag Ni(OH)2 species promote NO3- NO2- H2O dissociation generate *H, respectively, Ni(OH)2/Cu interface accelerates NH3. Meanwhile, using as anode cathode, two-electrode system integrating reaction 5-hydroxymethylfurfural oxidation achieves 98.1% 3.17 99.7% 2,5-furandicarboxylic acid selectivity 99.2% conversion.

Language: Английский

Hollow Square Ni-Doped Copper Oxide Catalyst Boosting Electrocatalytic Nitrate Reduction DOI
Yi Li, Jinshan Wei,

Hexing Lin

et al.

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

Citations

7
Skin-Interfaced Wearable Sensor for Long-Term Reliable Monitoring of Uric Acid and pH in Sweat DOI
Danfeng Jiang, Xiaohu Liu, Wenlong Zhan

et al.

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

Published: Jan. 17, 2025

Wearable sweat sensors offering real-time monitoring of biomarker levels suffer from stability and accuracy issues, primarily due to low concentrations, fluctuating pH, material detachment sensor deformation. Here, we developed a wearable sensing system integrated with two advanced electrodes flexible microchannel for long-term reliable pH uric acid (UA). By printing the ink doped nanomaterials (Co3O4@CuCo2O4 polyaniline), achieved highly stable direct analysis perspiration, without additional surface modification. Additionally, provided means sensitivity calibration, reducing effect individual metabolism exercise intensity. As result, effective gout management was validated by accurately tracking UA fluctuations in serum hyperuricemia patients healthy individuals. These findings offer method biomarkers assess personal health.

Language: Английский

Citations

2
Co-Doped CuO Nanoarrays for Enhanced Electrocatalytic Nitrate Reduction to Ammonia via Active Hydrogen Regulation DOI

Zhexuan Li,

Yaxuan Li,

Song Cheng

et al.

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

Published: Jan. 27, 2025

Language: Английский

Citations

1
Balancing Hydrogen Evolution and Hydrogenation Reaction via Facet Engineering for Efficient Conversion of Nitrate to Ammonia in Actual Wastewater DOI Open Access

Wenye Zhong,

Yan Chen, Peiyan Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract Due to the competitive relationship between nitrate reduction reaction (NO 3 − RR) and hydrogen evolution (HER), conventional approach improve Faradaic efficiency is select a catalyst without HER activity. Nevertheless, such strategy not only limits application of catalysts in NO RR, but also causes insufficient source, thereby sacrificing ammonia yield rate. We believe that should be excluded from hydrogenation reduction. Herein, taking traditional water electrolysis material Co O 4 as model system, we reveal oxygen vacancies on crystal facet can greatly promote dissociation capture intermediate for successfully shifting pathway hydrogenation. Beyond development, construct hybrid reactor achieve an recovery rate 1216.8 g‐N m −2 d −1 nuclear industry wastewater with ultra‐high concentration. This study breaks through limitation which provides significant insight into designing mechanism.

Language: Английский

Citations

1
Defect‐Enriched Cobalt‐Based Coordination Polymers for Selective and Efficient Nitrate Electroreduction to Ammonia DOI Open Access

Yidan Ding,

S. Zhang, Yunxia Liu

et al.

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

Published: March 3, 2025

Abstract Electrocatalytic nitrate reduction to ammonia (NRA) offers an arousing route for converting widespread pollutant under mild conditions. Among other NRA catalysts, single‐atom catalyst (SAC) has emerged as a promising candidate due its numerous advantages such maximum metal‐atom‐utilization efficiency, homogeneous and tailorable active sites, which still encounters formidable challenge accelerate the kinetics simultaneously suppress competitive hydrogen evolution reaction, especially when operated in electrolytes with low concentration nitrate. Herein, general strategy is reported prepare defect‐enriched coordination polymer catalysts featuring well‐defined unsaturated metal can exhibit exceptional performance even at surpass SACs toward catalysis. Taking cobalt (Co) example, Co‐based polymers (d‐CoCP) counterpart CoCP without defects are investigated proof‐of‐concept study. Both experimental theoretical results elucidate that elaborately‐engineered d‐CoCP markedly decrease thermodynamic barrier reducing *NO *HNO rate‐limiting step along pathway, thus accelerating adsorption of promoting kinetics.

Language: Английский

Citations

1
Balancing Hydrogen Evolution and Hydrogenation Reaction via Facet Engineering for Efficient Conversion of Nitrate to Ammonia in Actual Wastewater DOI Open Access

Wenye Zhong,

Yan Chen, Peiyan Chen

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

Abstract Due to the competitive relationship between nitrate reduction reaction (NO 3 − RR) and hydrogen evolution (HER), conventional approach improve Faradaic efficiency is select a catalyst without HER activity. Nevertheless, such strategy not only limits application of catalysts in NO RR, but also causes insufficient source, thereby sacrificing ammonia yield rate. We believe that should be excluded from hydrogenation reduction. Herein, taking traditional water electrolysis material Co O 4 as model system, we reveal oxygen vacancies on crystal facet can greatly promote dissociation capture intermediate for successfully shifting pathway hydrogenation. Beyond development, construct hybrid reactor achieve an recovery rate 1216.8 g‐N m −2 d −1 nuclear industry wastewater with ultra‐high concentration. This study breaks through limitation which provides significant insight into designing mechanism.

Language: Английский

Citations

1
Electron-deficient CoO induced charge redistribution on CuCoO-NC nanohybrid for electrocatalytic reduction of nitrate to ammonia DOI
Yi Li, Yuhang He,

Yujuan Pu

et al.

Fuel, Journal Year: 2024, Volume and Issue: 380, P. 133159 - 133159

Published: Sept. 17, 2024

Language: Английский

Citations

4
Recent advances in metal single−atom catalysts for ammonia electrosynthesis DOI
Zhan Lu, Jijie Zhang, Yuting Wang

et al.

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review provides insight into the development of advanced metal single-atom catalysts for ammonia electrosynthesis.

Language: Английский

Citations

0
Strain relaxation enhances ammonia electrosynthesis from nitrate on Cu/CuAu core/shell nanocrystals with ordered intermetallic layers DOI
Qiang Gao, Bingqing Yao, Yuanqi Liu

et al.

Chem Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 101328 - 101328

Published: March 1, 2025

Language: Английский

Citations

0
Amorphous CuCoOx Boosts Active Hydrogen for High‐Rate Tandem Electroreduction of Nitrate to Ammonia DOI Open Access

Aomeng Deng,

Jingjing Liu,

Qiu‐Yue Li

et al.

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

Published: March 26, 2025

The electroreductive conversion of waste nitrate (NO₃⁻) to high-value ammonia (NH₃) offers an alternative the energy-intensive Haber-Bosch process. However, this reaction involves multistep electron-coupled proton transfer, posing kinetic challenges for NH₃ generation. Herein, a-CuCoOx-based tandem electrocatalyst nitrate-to-ammonia is presented. In 1 M KOH with 50 mM NO₃⁻, amorphous catalyst achieves a Faradaic efficiency (FE) 95.61% and yield rate 4.01 mg h⁻¹ cm⁻2 at -0.3 V versus RHE, outperforming its crystalline counterpart (FE: 80.21%; rate: 0.91 cm⁻2). Integrated into Zn-NO₃⁻ battery, a-CuCoOx exhibits peak power density 7.21 mW robust stability. Systematic electrochemical analyses revealed that structure Cu-Co synergy enhance active hydrogen (H*) generation accelerate nitrite-to-ammonia conversion. This study provides insights designing advanced electrocatalysts sustainable energy catalysis.

Language: Английский

Citations

0