Synergistically Promoting Oxygen Electrocatalysis through the Precise Integration of Atomically‐Dispersed Fe Sites and Co Nanoparticles

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Abstract Oxygen electrochemistry, which encompasses the oxygen reduction reaction (ORR) and evolution (OER), is of utmost importance in energy‐related reactions such as zinc‐air batteries (ZABs). However, due to their four‐electron transfer process, these are still significantly restricted by sluggish kinetics. Supporting atomically‐dispersed (AD) catalyst or metal nanoparticles (NPs) on nitrogen‐doped carbon (NC) proven be an effective strategy for enhancing performance electrocatalysis. Nevertheless, types catalysts fails meet critical requirements ZABs. Herein, a novel Fe AD Co NPs @NC, consists both Fe‐N 1 sites lattice, developed. Spectroscopy studies density functional theory calculations indicate that site lattice facilitates conversion amorphous CoOOH, serves main active ORR. @NC demonstrates remarkable activity OER When it used air‐electrode ZABs, power 247.49 mW cm −2 . This work presents simple yet efficient method enhance electrochemical through synergy between NPs.

Language: Английский

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Insight into the Hybrid Zn–Co/Air Batteries Coupling Faradic Redox and Oxygen Catalytic Reactions

Batteries & Supercaps, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Hybrid Zn–Co/air batteries achieve both high energy density and efficiency by coupling the oxygen catalytic reaction of Zn–air Faradic redox Zn–Co batteries. However, challenges exist in practical applications, including low utilization rate active material, insufficient activity, unmatched interfaces. These limitations hinder performance hybrid restrict their ability broader application scenarios. This work reviews recent development focuses on core issues. In terms material structure design, advancements are made microstructure optimization, defect engineering, ion doping, electrochemical activation. area activity improvements achieved through optimization support materials, structural engineering. field interface progress has been hydrophilicity hydrophobicity gas transfer channel electrode design. Finally, this summarizes future research directions technical to promote commercialization The in‐depth analysis aims provide valuable guidance researchers develop next‐generation high‐performance

Language: Английский

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In-situ construction of 2D β-Co(OH)2 nanosheets hybridized with 1D N-doped carbon nanotubes as efficient bifunctional electrocatalyst for oxygen reduction and evolution reactions

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 503, P. 158437 - 158437

Published: Dec. 10, 2024

Language: Английский

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Heterogeneous interface engineering to enhance oxygen electrocatalytic activity for rechargeable zinc–air batteries

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Co/CoO heterojunctions embedded in N-doped hollow carbon nanospheres coupled with multiple active sites promote the electron transfer of oxygen-related intermediates and modulate surface engineering promoting ORR/OER activity.

Language: Английский

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