Phosphorus Doping in Co₉S₈/Ni₃S₂ Hollow Nanorods for Supercapacitors

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

Published: Jan. 9, 2025

Metal sulfides, characterized by high crystalline stability and narrowed band gap, are recognized as effective electrode materials for energy storage in alkaline environments. This study enhances the surface activity Co9S8/Ni3S2 hollow nanorod arrays incorporating phosphorus (P) doping. In situ Raman spectroscopy confirms that P doping facilitates rapid reconstruction media, resulting substantial amounts of oxyhydroxides significantly enhance density supercapacitors. The optimized P–Co9S8/Ni3S2 (1 h) demonstrates a 4.56-fold increase performance over original Co9S8/Ni3S2, achieving capacitance 20.5 F·cm–2 at 3 mA·cm–2 2 M KOH. hybrid supercapacitor device assembled with activated carbon achieves an 1.73 mWh cm–2 power 4.95 mW cm–2, showcasing cycling life 84.6% capacity retention after 10,000 cycles. work effectively reconstructs oxyhydroxide species on electrodes environments through engineering, providing valuable guidance design reconstructions metal sulfide using atom engineering.

Language: Английский

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High‐Entropy 1T‐Phase Quantum Sheets of Transition‐Metal Disulfides

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Quantum sheets of transition-metal dichalcogenides (TMDs) are promising nanomaterials owing to the combination both 2D nanosheets and quantum dots with distinctive properties. However, usually possess semiconducting behavior associated 2H phase, it remains challenging produce 1T-phase due easy sliding basal plane susceptible small lateral sizes. Here, an efficient high-entropy strategy is developed disulfides based on controllable introduction multiple metal atoms large size differences retard plane. The key topological conversion in-plane ordered carbide laminates (i-MAX) compatible high strains 1T which facilely triggers fracture into average 4.5 nm thickness 0.7 during exfoliation process. Thus, disulfide show electrocatalytic activities for lithium polysulfides, achieving a good rate performance 744 mAh g-1 at 5 C long cycle stability in lithium-sulfur batteries.

Language: Английский

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Functionalization Strategies of MXene Architectures for Electrochemical Energy Storage Applications

Energies, Journal Year: 2025, Volume and Issue: 18(5), P. 1223 - 1223

Published: March 2, 2025

MXene, an emerging class of two-dimensional materials, has garnered significant attention in electrochemical energy storage applications due to its high specific surface area, tunable functional groups, excellent electrical conductivity, and mechanical stability. However, their practical application devices remains challenged by issues such as the stacking layered structure, degradation, limited ion diffusion properties. Functionalization emerged a key strategy enhance performance MXene materials. By modulating doping with various elements, integrating other researchers have significantly improved chemical stability, transport properties, strength MXenes. This review provides comprehensive overview categorizing them highlighting advantages applications. It also examines recent advancements preparation optimized synthesis strategies. In-depth discussions are presented on functionalization MXenes devices, including supercapacitors, lithium-ion batteries, sodium-ion batteries. Finally, concludes summary explores future research directions, aiming guide further developments field.

Language: Английский

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Transition Metal Dichalcogenides in Electrocatalytic Water Splitting

Catalysts, Journal Year: 2024, Volume and Issue: 14(10), P. 689 - 689

Published: Oct. 3, 2024

Two-dimensional transition metal dichalcogenides (TMDs), also known as MX2, have attracted considerable attention due to their structure analogous graphene and unique properties. With superior electronic characteristics, tunable bandgaps, an ultra-thin two-dimensional structure, they are positioned significant contenders in advancing electrocatalytic technologies. This article provides a comprehensive review of the research progress TMDs field water splitting. Based on fundamental properties principles electrocatalysis, strategies enhance performance through layer control, doping, interface engineering discussed detail. Specifically, this delves into basic properties, reaction mechanisms, measures improve catalytic splitting, including creation more active sites, phase engineering, construction heterojunctions. Research these areas can provide deeper understanding guidance for application thereby promoting development related technologies contributing solution energy environmental problems. hold great potential future needs further explore develop new TMD materials, optimize catalysts achieve efficient sustainable conversion. Additionally, it is crucial investigate stability durability during long-term reactions longevity. Interdisciplinary cooperation will bring opportunities research, integrating advantages different fields from practical application.

Language: Английский

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Introduction: Two-Dimensional Layered Transition Metal Dichalcogenides

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(19), P. 10619 - 10622

Published: Oct. 9, 2024

Language: Английский

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Cobalt-Nickel Sulfide Hierarchical Hollow Microspheres to Boost Electrochemical Activity for Supercapacitors

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 177730 - 177730

Published: Nov. 1, 2024

Language: Английский

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Interface effect-boosted Ni(OH)2@CoP core–shell nanoarrays as bifunctional electrocatalyst for urea-assisted energy-saving hydrogen production via water splitting

Fuel, Journal Year: 2025, Volume and Issue: 386, P. 134285 - 134285

Published: Jan. 7, 2025

Language: Английский

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Rational Design Heterobilayers Photocatalysts for Efficient Water Splitting Based on 2D Transition-Metal Dichalcogenide and Their Janus

Published: Jan. 1, 2025

Direct Z-scheme-heterostructures with enhanced redox potential are increasingly regarded as promising materials for solar-driven water-splitting. This arises from the synergistic interaction between intrinsic dipoles in Janus and interfacial electric fields across layers. In this study, we explore photocatalytic of 20 two-dimensional Janus-transition-metal-dichalcogenide (TMD) heterobilayers efficient Utilizing density-functional theory calculations, first screen these based on key properties such band gaps magnitude to identify candidates. We then evaluate additional critical factors, including carrier mobility surface chemical reactions, fully assess their performance. By examining alignment synthetic internal fields, distinguish Type-I, Type-II, Z-scheme configurations, enabling targeted design optimal materials. Furthermore, employ Fröhlich model quantify contributions longitudinal-optical phonon mode, providing detailed insights into how mobility, influenced by scattering, affects Our results reveal that several Janus-TMDC heterobilayers, WSe2-SWSe, WSe2-TeWSe, WS2-SMoSe, exhibit strong absorption visible spectrum achieve solar-to-hydrogen conversion efficiencies up 33.24%. research highlights a viable pathway advancing clean energy generation through processes.

Language: Английский

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Local Strain Engineering of Two-Dimensional Transition Metal Dichalcogenides Towards Quantum Emitters

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Jan. 8, 2025

Abstract Two-dimensional transition metal dichalcogenides (2D TMDCs) have received considerable attention in local strain engineering due to their extraordinary mechanical flexibility, electonic structure, and optical properties. The strain-induced out-of-plane deformations 2D TMDCs lead diverse excitonic behaviors versatile modulations properties, paving the way for development of advanced quantum technologies, flexible optoelectronic materials, straintronic devices. Research on has been delved into fabrication techniques, electronic state variations, applications. This review begins by summarizing state-of-the-art methods introducing TMDCs, followed an exploration impact intriguing phenomena resulting from strain, such as exciton funnelling anti-funnelling, are also discussed. We then shift focus application locally strained emitters, with various strategies outlined modulating properties TMDC-based emitters. Finally, we discuss remaining questions this field provide outlook future TMDCs.

Language: Английский

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Partially amorphous vanadium oxysulfide for achieving high-performance Li-ion batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 685, P. 615 - 625

Published: Jan. 21, 2025

Language: Английский

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