Efficient Catalysis for Zinc–Air Batteries by Multiwalled Carbon Nanotubes‐Crosslinked Carbon Dodecahedra Embedded with Co–Fe Nanoparticles

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Abstract The design and fabrication of nanocatalysts with high accessibility sintering resistance remain significant challenges in heterogeneous electrocatalysis. Herein, a novel catalyst is introduced that combines electronic pumping alloy crystal facet engineering. At the nanoscale, pump leverages chemical potential difference to drive electron migration from one region another, separating transferring electron‐hole pairs. This mechanism accelerates reaction kinetics improves rate. interface structure optimization enables CoFe/carbon nanotube (CNT) exhibit outstanding oxygen reduction (ORR) evolution (OER) performance. Specifically, this achieves an ORR half‐wave (E₁/₂) 0.895 V, outperforming standard Pt/C RuO₂ electrocatalysts terms both specific activity stability. It also demonstrates excellent electrochemical performance for OER, overpotential only 287 mV at current density 10 mA cm⁻ 2 . Theoretical calculations reveal carefully designed facets reduce energy barrier rate‐determining steps optimizing O₂ adsorption promoting capture process. study highlights developing cost‐effective bifunctional ORR–OER electrocatalysts, offering promising strategy advancing Zn–air battery technology.

Язык: Английский

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Modulating oxygen reduction reaction activity in nitrogen-doped porous carbon via Al-N-C incorporation for enhanced performance in liquid and solid-state Zn-air batteries

Journal of Power Sources, Год журнала: 2025, Номер 630, С. 236150 - 236150

Опубликована: Янв. 5, 2025

Язык: Английский

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Synergistic regulation of different coordination shells of iron centers by sulfur and phosphorus enables efficient oxygen reduction in zinc-air batteries

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 688, С. 161 - 171

Опубликована: Фев. 20, 2025

Язык: Английский

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Tailoring Oxygen Electrocatalytic Performance via Construction of Iron‐Cobalt Oxides and FeN₄ Sites on Hierarchical Carbon Fibers for Efficient Zinc–Air Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract The design and fabrication of non‐precious metal materials for bifunctional oxygen electrocatalytic properties with reversible reduction reaction (ORR) evolution (OER) has been a research hotspot in the field zinc–air batteries. Herein, hierarchical carbon nanofiber immobilized iron cobalt oxide particles (FeCoO x ) Fe‐N sites catalyst is synthesized through electrostatic spinning situ polymerization pyrrole coupled pyrolysis. FeCoO /Fe─N─C demonstrates superior performance (E 1/2 = 0.91 V, η 10 350 mV). Liquid batteries employing exhibit high power 184.8 mW cm −2 more than 580 cycles stable cycling ability. Additionally, incorporation cobaltite introduces extra electrons optimizes adsorption capacity intermediates, effectively boosting inherent ORR activity. experimental results illustrate that special geometrical structure spinel ferrite provides excellent OER catalytic performance. Theoretical calculations indicate shifts d‐band center closer to Fermi level f ), thereby modulating hybridization between Fe 3d O 2p orbitals. This work offers an effective approach constructing coupling catalysts have single atoms coexisting efficient catalysis.

Язык: Английский

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Honeycomb-Like Single-Atom Catalysts with FeN3Cl Sites for High-Performance Oxygen Reduction

Advanced Powder Materials, Год журнала: 2025, Номер unknown, С. 100298 - 100298

Опубликована: Апрель 1, 2025

Язык: Английский

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Bridging links between solid electrolytes and electrodes: Boosting the electrochemical performance of flame-retardant solid electrolytes with vapor-deposited carbon and gold-sputtered nanolayers

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 157741 - 157741

Опубликована: Ноя. 1, 2024

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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