Fe nanoparticles confined by multiple-heteroatom-doped carbon frameworks for aqueous Zn-air battery driving CO2 electrolysis

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 655, P. 176 - 186

Published: Nov. 2, 2023

Language: Английский

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Lattice Strain‐Modulated Trifunctional CoMoO₄ Polymorph‐Based Electrodes for Asymmetric Supercapacitors and Self‐Powered Water Splitting

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

Published: Jan. 13, 2025

Abstract Developing efficient, multifunctional electrodes for energy storage and conversion devices is crucial. Herein, lattice strains are reported in the β‐phase polymorph of CoMoO 4 within @Co 3 O heterostructure via phosphorus doping (P‐CoMoO ) used as a high‐performance trifunctional electrode supercapacitors (SCs), hydrogen evolution reaction (HER), oxygen (OER) alkaline electrolytes. A tensile strain +2.42% on P‐CoMoO results superior electrochemical performance compared to . The optimized achieves high density 118 Wh kg −1 an asymmetric supercapacitor low overpotentials 189 mV HER 365 OER at current 500 mA cm −2 This overall water splitting voltage 1.71 V same making it effective bifunctional 1 m KOH freshwater electrolyte. Theoretical analysis shows that excellent can be attributed interfacial interactions between Co , which lead strong OH − adsorption barriers intermediates. Practical application demonstrated by using ‐based ASCs self‐generate (H 2 ||P‐CoMoO seawater electrolyzer, showcasing its potential future technologies.

Language: Английский

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Engineering Synergetic Fe‐Co Atomic Pairs Anchored on Porous Carbon for Enhanced Oxygen Reduction Reaction

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

Published: July 28, 2024

Abstract The rational design of heteronuclear dual‐atom catalyst (DAC) is intricate due to the random dispersion metal atoms under thermal treatment. Herein, a novel precursor pre‐orientation strategy reported construct Fe‐Co diatomic sites atomically dispersed on nitrogen doped carbon (Fe‐Co‐NC) via cubic Prussian blue analogue as source. Due specific synergy between Fe and Co centers, obtained Fe‐Co‐NC renders outstanding oxygen reduction reaction (ORR) performance with positive half‐wave potential good durability in wide pH range. Density functional theory further clarifies active centers reveals that dual atomic follows modulation mechanism, where intermediates tended adsorb site, while neighboring atom can assist by lowering d ‐band center site. Experimentally theoretically emphasizes priority catalysts over homonuclear Fe‐Fe‐NC Co‐Co‐NC DAC. Moreover, Zn‐Air battery (ZAB) microbial fuel cell (MFC) assembled cathodes both exhibit splendid power density (382 mW cm −2 for ZAB, 2034 ± 103 m MFC) well excellent stability. This work provides new perspective construction precise regulation catalysts.

Language: Английский

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Pyridinic‐N Seized Co in Biphasic Nanoarchitecture for Reversible Oxygen Electrocatalysis Enabling Longevous (>1200 h) Aqueous and Dual‐Anion Kosmotropic Electrolyte Stabilized High Power Quasisolid‐State Zn–Air Battery

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

Published: Jan. 19, 2025

Abstract Integration of different active sites by heterostructure engineering is pivotal to optimize the intrinsic activities an oxygen electrocatalyst and much needed enhance performance rechargeable Zn–air batteries (ZABs). Herein, a biphasic nanoarchitecture encased in situ grown N‐doped graphitic carbon (MnO/Co‐NGC) with heterointerfacial are constructed. The density functional theory model reveals formation lattice bridged pyridinic nitrogen atoms anchored Co species, which facilitate adsorption intermediates. Consequently, well‐designed catalyst accessible sites, abundant vacant coupling effects, simultaneously accelerate electron/mass transfer thus promotes trifunctional electrocatalysis. assembled aqueous ZAB delivers maximum power ≈268 mW cm −2 specific capacity 797.8 mAh g zn −1 along excellent rechargeability extremely small voltage gap decay rate 0.0007 V h . Further, fabricated quasisolid‐state owns remarkable 163 long cycle life, outperforming benchmark air‐electrode many recent reports, underlining its robustness suitability for practical utilization diverse portable applications.

Language: Английский

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N-Doped Graphene Quantum Dots Incorporated into NiCo Bimetallic-Organic Framework as an Electrocatalyst for Alkaline Water Splitting

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(2), P. 2086 - 2099

Published: Jan. 4, 2024

Rational tuning of the electronic structure is one feasible routes to enhance electrical conductivity electrocatalysts based on metal–organic frameworks (MOFs). Herein, a composite NiCo-MOF and N-doped graphene quantum dots (NGQDs) with hierarchical was synthesized via controlled electrodeposition strategy as an exemplary non-noble metal catalyst for alkaline water splitting. The increased active sites by synergy effect between Ni Co ions enhanced local through uniform incorporation NGQDs into porous matrix offer that only demanded overpotentials 218 359 mV deliver current density 100 mA·cm–2 toward HER OER, respectively, also exhibited drastically electrochemical stability over 150 h in media. In particular, assembled two-electrode setup overall electrolysis yields 10 at low cell voltage 1.62 V. This facile can provide creative avenue design efficient conductive MOF-based large-scale practical applications.

Language: Английский

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Influence of sorbitol as a green and inexpensive corrosion inhibitor for Al-air batteries: An experimental and theoretical study

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152793 - 152793

Published: June 3, 2024

Language: Английский

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Cu intercalation and defect engineering realize an atomic-scale hydrogen spillover effect in NbS₂ to boost acidic hydrogen evolution

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(6), P. 1899 - 1911

Published: Jan. 1, 2024

A Pt-free single-component HER electrocatalyst Cu 0.4 NbS 2-δ was synthesized. It is demonstrated that the atomic-scale hydrogen spillover pathways can be constructed in 2 by intercalation and S vacancy.

Language: Английский

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Design and laser processing of laminated 3D network for high-performance electrodes of metal-ion batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 393 - 407

Published: Jan. 29, 2025

Language: Английский

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Elucidating the Chirality-Induced Spin Selectivity Effect of Co-Doped NiO Deposited on Ni Foam for Highly Stable Zn–Air Batteries

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

Published: March 13, 2025

The urgent need to alleviate global warming and limit the consumption of fossil fuels has prompted development rechargeable Zn–air batteries (ZABs) considering their superior energy density, safety, cost-effectiveness. However, sluggish reaction kinetics oxygen evolution (OER) unfavorable properties conventional OER catalysts (including low electrical conductivity use active site-blocking binders) hinder practically viable ZABs. Herein, we report a distinct approach for directly synthesizing cobalt-doped nickel oxide (Co-NiO) with chiral structure on porous Ni foam via one-step hydrothermal process. chirality-induced spin selectivity (CISS) boosts kinetics, while Co doping elevates abundance sites catalyst. Co-NiO demonstrates an current density 10 mA cm–2 at 1.58 V versus reversible hydrogen electrode, outperforming both achiral undoped NiO. Furthermore, Co-NiO-based ZAB high open-circuit potential (1.57 V), charge/discharge overpotential (0.71 excellent stability 960 h (40 days) because CISS effect mitigates production corrosive singlet oxygen. These results represent prominent pathway advancement ZABs using low-cost catalyst modulated by heteroatomic doping.

Language: Английский

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Layered‐Hierarchical Dual‐Lattice Strain Suppresses Ni_xSe Surface Reconstruction for Stable OER in Alkaline Fresh/Seawater Splitting

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

Published: March 13, 2025

Abstract Transition metal selenides (TMSe) are promising oxygen evolution reaction (OER) electrocatalysts but act as precursors rather than the actual active phase, transforming into amorphous oxyhydroxides during OER. This transformation, along with formation of selenium oxyanions and unstable heterointerfaces, complicates structure‐activity relationship reduces stability. work introduces novel “layered‐hierarchical dual lattice strain engineering” to inhibit surface reconstruction Ni x Se by modulating both nickel foam (NF) substrate Mo 2 N nanosheets (NM) nanorods‐nanosheets catalytic layer (NiSe‐Ni 0.85 Se‐NiO, NSN) ultrafast interfacial bimetallic NiFeOOH coating, achieving optimized NM/NSN/NiFeOOH configuration. The NM induces strain, enhancing OER activity improving electron transport adhesion, while coating additional mitigating oxidative degradation, reinforcing structural integrity. catalyst demonstrates exceptional performance low overpotentials 208 mV@10 mA cm −2 outstanding stability over 100 h at in alkaline freshwater seawater. Theoretical analysis shows that effectively prevents degradation preserving sites for optimal intermediate interactions stabilizing electronic environment. provides a strategy TMSe beyond.

Language: Английский

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