Synthesis Strategies for High Entropy Nanoparticles

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

Published: Oct. 30, 2024

Abstract Nanoparticles (NPs) of high entropy materials (HEMs) have attracted significant attention due to their versatility and wide range applications. HEM NPs can be synthesized by fragmenting bulk HEMs or disintegrating recrystallizing them. Alternatively, directly producing in NP form from atomic/ionic/molecular precursors presents a challenge. A widely adopted strategy involves thermodynamically driving formation leveraging the entropic contribution but incorporating strategies limit growth at elevated temperatures used for maximizing entropy. second approach is kinetically drive promoting rapid reactions homogeneous reactant mixtures using highly diluted precursor dissolutions. Additionally, experimental evidence suggests that enthalpy plays role processes moderate temperatures, with energy cost generating additional surfaces interfaces nanoscale stabilizing phase. This review critically assesses various synthesis developed preparation, highlighting key illustrative examples offering insights into underlying mechanisms. Such are critical fine‐tuning conditions achieve specific outcomes, ultimately enabling effective optimized generations these advanced both current emerging applications across scientific technological fields.

Language: Английский

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Enhanced Performance and Durability of Zinc–Air Batteries Utilizing W‐Doped Cobalt Pentlandite Catalysts

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

Published: Jan. 23, 2025

Abstract The design of cost‐effective electrocatalysts is critical for advancing sustainable energy technologies, particularly key reactions like the oxygen evolution reaction (OER) and reduction (ORR) in water electrolyzers metal–air batteries. Cobalt pentlandite (CNFS) has emerged as a promising candidate, offering high conductivity, stability, advantage using abundant elements. In this study, density functional theory (DFT) calculations reveal that tungsten (W) doping CNFS, combined with an increased concentration sulfur vacancies, can effectively shift d‐band center downward enhancing metal‐sulfur orbital hybridization. These modifications facilitate desorption intermediate while maintaining structural integrity. Additionally, engineering material hollow architecture further increases active site exposure, significantly improving catalytic activity. As result multifaceted approach, W‐doped CNFS catalyst achieves remarkably low OER overpotential 241 mV at 50 mA cm⁻ 2 , alongside enhanced ORR Furthermore, demonstrates excellent performance rechargeable zinc–air batteries (ZABs), achieving peak power 100 mW sustaining over 650 h cycling 4 . Overall, study presents viable strategy ZAB reducing costs by utilizing efficient metal sulfides cobalt structure.

Language: Английский

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High electronegativity of Ag and P in high-entropy materials synergistically promotes efficient water electrolysis

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 521 - 530

Published: Jan. 25, 2025

Language: Английский

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Photothermal high-entropy materials: A review

Sustainable materials and technologies, Journal Year: 2025, Volume and Issue: unknown, P. e01316 - e01316

Published: Feb. 1, 2025

Language: Английский

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Enhancement of electrocatalytic efficiency by rapid bubble detachment at electrodeposited feather-like FeCoNiCuMn high-entropy alloy porous structure

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 113, P. 385 - 394

Published: March 1, 2025

Language: Английский

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Effects of Zr Alloying on Microstructure Evolution and Mechanical Properties of CoCrNi Medium Entropy Alloy

Crystals, Journal Year: 2025, Volume and Issue: 15(3), P. 258 - 258

Published: March 10, 2025

Alloying provides an effective approach to designing metallic materials with unique microstructures and enhanced performance. In this work, we developed a series of (CoCrNi)100−xZrx (where x = 1, 2, 3, 4, 5) medium entropy alloys (MEAs) by vacuum arc-melting method. The effects Zr addition on the mechanical properties MEAs were systematically investigated. Due negative mixing enthalpy Co, Cr, Ni, lamellar C15 Laves-phase precipitates formed within ductile FCC matrix. As content increases, exhibit higher strength but become more brittle at room temperature. Among series, CoCrNiZr3 MEA shows excellent balance between ductility, achieving compressive yield 610 MPa hardness 249 HV, respectively, while maintaining good ductility beyond 45%. Microstructural analysis using scanning electron microscope transmission suggests that outstanding strength-ductility arises from synergistic effect precipitation strengthening solid solution strengthening. These findings not only provide deeper insight into interaction different mechanisms also offer valuable guidance for high-performance multi-component through strategic alloying.

Language: Английский

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Boosting HER Activity of FeCoNiMnZn High-Entropy Alloys supported on Nitrogen-doped Carbon Nanotubes

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112365 - 112365

Published: March 1, 2025

Language: Английский

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Harnessing machine learning for high-entropy alloy catalysis: a focus on adsorption energy prediction

npj Computational Materials, Journal Year: 2025, Volume and Issue: 11(1)

Published: April 4, 2025

Language: Английский

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High entropy nanomaterials for zero-emission energy systems: advanced structural design, catalytic performance and functional mechanisms

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Unveiling the heterogeneous structure of FeCoNiPdCu High-Entropy Alloy: A case study on electrochemical nitrate reduction

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163269 - 163269

Published: April 1, 2025

Language: Английский

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