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

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 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.

Язык: Английский

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Engineering NiFe2O4 decorated with IrO2 on plasma-treated iron foam for enhanced electrocatalytic hydrogen evolution

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 137843 - 137843

Опубликована: Май 1, 2025

Язык: 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, Год журнала: 2024, Номер 503, С. 158437 - 158437

Опубликована: Дек. 10, 2024

Язык: Английский

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

Batteries & Supercaps, Год журнала: 2025, Номер unknown

Опубликована: Апрель 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

Язык: Английский

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Pyrrole Nitrogen Coordination Activates Intrinsically Catalytically Inert Mo for Oxygen Reduction Reaction

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

Electronic structure modulation is a promising approach to enhance the properties of intrinsically inert metals in an electrocatalytic oxygen reduction reaction. Herein, molybdenum (Mo) single atom (Mo SAs) catalyst with pyrrole-rich nitrogen/oxygen double coordination has been designed and synthesized (defined as Mo SAs/N-C). The pyrrole-nitrogen (Pyrr-N) was shown effectively regulate metal-centered electronic Mo. This strategy enables SAs/N-C exhibit superior catalytic activity enhanced 4e- transfer selectivity. electrochemical performance evaluations revealed that exceptional durability (with only 2.0 mV half-wave potential decay after 5000 cycles) resistance methanol toxicity, outperforming commercial Pt/C (20%). Notably, air-cathode for zinc-air batteries, achieved peak power density 242 mW cm-2. Combining experimental results functional theory calculations, it found Pyrr-N modulates adsorption OOH* intermediates on atoms, promoting pathway significantly enhancing ORR. study provides valuable insights into role improving single-atom catalysts.

Язык: Английский

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Interfacial optimization and p-p heterojunction construction in multifunctional cathode material for alkaline hybrid zinc battery

Electrochimica Acta, Год журнала: 2025, Номер unknown, С. 146359 - 146359

Опубликована: Май 1, 2025

Язык: Английский

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Cobalt-Decorated Carbonized Wood as an Efficient Electrocatalyst for Water Splitting

Catalysts, Год журнала: 2025, Номер 15(5), С. 503 - 503

Опубликована: Май 21, 2025

The efficient mass transport and enhanced accessibility of active sites are crucial for high-performance electrocatalysts in water splitting. Inspired by the hierarchical structure natural wood, we engineered a monolithic electrocatalyst, cobalt nanoparticles encapsulated nitrogen-doped carbon layers on carbonized wood (Co@NC/CW), carbonizing to create three-dimensional framework with vertically aligned macropores. unique architecture encapsulates within situ-grown graphene wood-derived microchannels, facilitating ultrafast electrolyte infusion anisotropic electron transport. As result, optimized freestanding Co@NC/CW electrode exhibits remarkable bifunctional activity, achieving overpotentials 403 mV 227 oxygen evolution reaction (OER) hydrogen (HER), respectively, at current density 50 mA cm−2. Furthermore, integrated hybrid electrolyzer combining HER OER delivers an impressive A cm−2 cell voltage 1.72 V while maintaining Faradaic efficiency near 99.5% sustaining long-term stability over 120 h continuous operation. also demonstrates performance complete decomposition alkaline seawater, underscoring its potential scalable applications. This catalyst design not only leverages porosity but offers sustainable platform advanced electrochemical systems.

Язык: Английский

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

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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