Modulating electronic structure of CoS2 nanorods by Fe doping for efficient electrocatalytic overall water splitting

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110564 - 110564

Published: Dec. 1, 2024

Language: Английский

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Synergistic enhancement of overall seawater splitting by atomic doping and heterostructure interface engineering in W–MoS2@FeNi2S4/NF catalyst

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 101, P. 1044 - 1053

Published: Jan. 6, 2025

Language: Английский

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Self‐Supported Super‐Hydrophilic Interconnected Nanospikes and Particles of MoS₂‐Ni₃S₂/NF with Optimum d‐Band Center for Anion Exchange Membrane Water Electrolyzer

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Abstract There is an imperative need for highly efficient electrocatalysts cost‐effective hydrogen production. Herein, a self‐supported, hybrid composite as bifunctional electrocatalyst introduced. This achieved by in situ growth of MoS 2 ‐Ni 3 S on nickel foam (NF), designated /NF, synthesized facile one‐step hydrothermal synthesis method. /NF exhibits low overpotentials only 187 and 146 mV OER HER, respectively, to achieve current density 10 mA cm −2 1 M KOH. The practical application the designed verified constructing || symmetrical membrane electrode assembly (MEA) 4 working area anion exchange water electrolyzer. system shows continuous electrolysis monitored 48 h duration. For OER, optimum d‐band center −1.66 eV heterostructure calculated from Density Functional Theory (DFT) studies. factors like unique structure electrocatalyst, enhanced hydrophilicity, improved electrochemically accessible number sites (ECASs), center, are expected be primary contributors system's performance. Thus, present finding unveils straightforward approach creating stable advancing commercial realm renewable electrochemical energy conversion.

Language: Английский

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Fe-doped Ni₃S₂/NiS heterojunction with improved electrocatalytic activity and stability for the alkaline oxygen evolution reaction

Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The heterostructure catalyst Fe-Ni 3 S 2 /NiS exhibits excellent activity and stability. doped Fe acts as a sacrificial agent in the oxygen evolution reaction (OER), maintaining high of Ni, preventing Ni–S bond degradation.

Language: Английский

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Ultrafast synthesis of nickel-ruthenium hydroxide ultrathin nanosheets decorated nickel sulfide with efficient overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 690, P. 137336 - 137336

Published: March 14, 2025

Language: Английский

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Fe, Mo co-doping enhances the OER performance of nickel sulfide nanoflakes for seawater electrolysis

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1010, P. 177480 - 177480

Published: Nov. 10, 2024

Language: Английский

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Hollow Fe‐Doped Ni(OH)₂–NiS@Ni(OH)₂ Nanorod Array with Regulated Heterostructural Interface and Band Structure for Expediting Alkaline Electrocatalytic Overall Water Splitting

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

Published: Aug. 2, 2024

Abstract Aiming to efficiently expedite alkaline overall water splitting (OWS) by addressing challenges such as sluggish kinetics and limited stability, a hollow Fe‐doped Ni(OH) 2 ‐NiS@Ni(OH) nanorod array with surface nanosheets is devised, featuring high‐index (101)‐NiS(211) heterostructural interface an upshifted d ‐band center. This nanoarchitecture intensifies the adsorption interaction of H O OH − reactants on electrocatalyst surface, suitably bonds * intermediate in hydrogen evolution reaction (HER) accelerates electron movement H, minimizes energy requirement rate‐limiting phase ( → O) oxygen (OER) facilitating O─H cleavage optimally adsorbs O, amplifies exposure surface‐active centers, ultimately reduces apparent activation energy. Consequently, overpotentials are low 66.4 mV 254.9 at 10 mA cm −2 , alongside high turnover frequencies 142 s −1 (H ) 279 (O 100 300 mV, respectively, markedly outperforming direct‐electrodeposited analogues. When functioning bifunctional electrode OWS, this material merely requires 1.57 V sustains operation for 168 h, approaching Pt/C||RuO benchmark.

Language: Английский

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Synergistic Fe,Ce doping of Ni₃S₂ for enhancing oxygen evolution reaction performance

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Fe,Ce-Ni 3 S 2 @NF nanoneedle catalysts synthesised via a one-step hydrothermal route showed good OER performance.

Language: Английский

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Design of Iron-Based Multifunctional Alloys Electrodeposited from Complexing Electrolytes

Materials, Journal Year: 2025, Volume and Issue: 18(2), P. 263 - 263

Published: Jan. 9, 2025

There is a growing focus on sustainability, characterized by making changes that anticipate future needs and adapting them to present requirements. Sustainability reflected in various areas of materials science as well. Thus, more research focused the fabrication advanced based earth-abundant metals. The role iron its alloys particularly significant second most abundant metal our planet. Additionally, electrochemical method offers an environmentally friendly approach for synthesizing multifunctional alloys. can be successfully codeposited with targeted from complexing electrolytes, opening large horizon smart tuning properties enabling applications. In this review, we discuss practical aspects electrodeposition iron-based refractory metals having magnetic, catalytic, mechanical, antimicrobial/antibacterial thermal, wear, corrosion resistance. Peculiarities electrolytes are practically they greatly influence final structure, composition, designed adjusting electroactive complexes solution. Moreover, these further upgraded into composites, multi-layered, hybrid/recovered materials, or high-entropy

Language: Английский

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Independent Tuning of Intermediate Energetics for Enhanced Oxygen Evolution via Synergistic Defects

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

Published: Feb. 14, 2025

Abstract Electronic structure engineering via integrating different defects is the key to achieving independent tuning of intermediate energetics for efficient electrocatalyst design. Such a combination at forefront current research. Herein, W etched from Co(OH) 2 generate Co vacancies, which are then partially filled with La form ‐Co V ‐La D oxygen evolution reaction (OER). The results show that vacancy and dopant induce more high‐valence species under OER conditions most active center surface site adjacent subsurface on sides, where optimized electronic narrows gap between Gibbs free energies OH* (ΔG ) OOH* modifies ΔG O* close midpoint, leading high catalytic activity. integration synergistic offers an effective strategy range defect atomic configurations diverse states, enable energetics, thereby unlocking catalyst's full potential.

Language: Английский

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