A carboxylate linker strategy mediated densely accessible Fe-N4 sites for enhancing oxygen electroreduction in Zn-air batteries

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 665, P. 879 - 887

Published: March 29, 2024

Language: Английский

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Unraveling the Harmonious Coexistence of Ruthenium States on a Self‐Standing Electrode for Enhanced Hydrogen Evolution Reaction

Energy & environment materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 2, 2024

The development of cost‐effective, highly efficient, and durable electrocatalysts has been a paramount pursuit for advancing the hydrogen evolution reaction (HER). Herein, simplified synthesis protocol was designed to achieve self‐standing electrode, composed activated carbon paper embedded with Ru single‐atom catalysts nanoclusters (ACP/Ru SAC+C ) via acid activation, immersion, high‐temperature pyrolysis. Ab initio molecular dynamics (AIMD) calculations are employed gain more profound understanding impact activation on paper. Furthermore, coexistence states atoms confirmed aberration‐corrected scanning transmission electron microscopy (AC‐STEM), X‐ray photoelectron spectroscopy (XPS), absorption (XAS). Experimental measurements theoretical reveal that introducing site adjacent induces synergistic effect, tuning electronic structure thereby significantly enhancing their catalytic performance. Notably, ACP/Ru exhibits remarkable turnover frequency (TOF) 18 s −1 an exceptional mass activity (MA) 2.2 A mg , surpassing performance conventional Pt electrodes. featuring harmoniously coexisting states, stands out as prospective choice HER catalysts, energy efficiency, productivity, selectivity.

Language: Английский

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Fe based MOF encapsulating triethylenediamine cobalt complex to prepare a FeN3-CoN3 dual-atom catalyst for efficient ORR in Zn-air batteries

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 676, P. 871 - 883

Published: July 23, 2024

Language: Английский

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A Hybrid Redox‐Mediated Zinc‐Air Fuel Cell for Scalable and Sustained Power Generation

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(16)

Published: Feb. 23, 2024

Zinc-air batteries (ZABs) have attracted considerable attention for their high energy density, safety, low noise, and eco-friendliness. However, the capacity of mechanically rechargeable ZABs was limited by cumbersome procedure replacing zinc anode, while electrically suffer from issues including depth discharge, dendrite dead formation, sluggish oxygen evolution reaction, etc. To address these issues, we report a hybrid redox-mediated zinc-air fuel cell (HRM-ZAFC) utilizing 7,8-dihydroxyphenazine-2-sulfonic acid (DHPS) as anolyte redox mediator, which shifts oxidation reaction electrode surface to separate tank. This approach decouples feeding electricity generation, providing greater operation flexibility scalability large-scale power generation applications. The DHPS-mediated ZAFC exhibited superior peak density 0.51 W/cm

Language: Английский

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Atomically dispersed Fe/Co–N–C and their composites for proton exchange membrane fuel cells

Materials Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 8(8), P. 1927 - 1949

Published: Jan. 1, 2024

Atomically dispersed Fe/Co–N–C and their composites for fuel cells.

Language: Английский

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Rational Design of Bimetal Nanoparticles Anchored Hierarchical Carbon Nanospheres with Abundant Active Sites for High-Performance Liquid/Flexible Zinc-Air Batteries

Published: Jan. 1, 2025

The development of highly active bifunctional electrocatalysts is crucial to the sluggish oxygen reduction reaction/oxygen evolution reaction (ORR/OER) for efficient wearable Zn–air batteries (ZAB). Fe-Nx-C moieties anchored on carbon supports emerge as a desirable alternative ORR catalysts but its OER activity suffers from low catalytic performance and stability. Herein, N-doped carbon-encapsulated Fe3C MnO nanoparticles composite (FeMn-NC) was developed using simple one-step pyrolysis self-sacrificial template. obtained FeMn-NC possess hierarchical porous structure with large specific surface area rich pyridinic N, which are favorable exposure sites. introduction Fe3C/MnO interface can regulate charge redistribution promote ORR/OER kinetics, confirmed by theoretical calculations. exhibits an excellent in alkaline electrolytes.The assembled liquid ZAB cathode achieve ultrahigh capacity 831.7 mAh g-1 charge-discharged stability up 800 h at 10 mA cm⁻² (2400 cycles). Furthermore, corresponding flexible solid-state provides stable open-circuit voltage 1.50 V 676.1 g−1 1.0 cm-2 good cycling This work offers strategy synthesize materials properties, be applied other electrochemical energy devices.

Language: Английский

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The single Fe atom anchored to graphitic carbon nitride doped air-cathode for bioenergy generation and tetracycline degradation in microbial fuel cells

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 631, P. 236228 - 236228

Published: Jan. 22, 2025

Language: Английский

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Consequences of the co-existence of single-atom and nanoparticle catalysts

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 116012 - 116012

Published: Feb. 1, 2025

Language: Английский

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Co-Fe3C nanoparticles encapsulated in N-doped carbon matrix carbon as bifunctional electrocatalyst for oxygen reaction and reversible zinc-air batteries

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179961 - 179961

Published: March 1, 2025

Language: Английский

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Progress of synergistic oxygen electrocatalysis between single atoms and nanoparticles/clusters

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 125, P. 86 - 99

Published: April 8, 2025

Language: Английский

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