Differentiated Modulating the Electronic Structure of NiFe@Ni/Fe‐MnOx via Phase Transformation Engineering to Synergy Promote Bifunctional Water Splitting Reactions

Small, Journal Year: 2025, Volume and Issue: 21(7)

Published: Jan. 7, 2025

Abstract Modulating electronic structure to balance the requirement of both hydrogen evolution reaction (HER) and oxygen (OER) is crucial for developing bifunctional catalysts. Herein, phase transformation engineering utilized separately regulate catalyst structure, designed NiFe@Ni/Fe‐MnOOH schottky heterojunction exhibits remarkable electrocatalytic activity with low overpotentials 19 230 mV at 10 mA cm −2 HER OER in 1M KOH, respectively. Meanwhile, an anion‐exchange membrane water electrolyzer employing as electrodes shows voltages 1.487/1.953 V 10/1000 , operating over 200 h 1000 . Combining theoretical calculations experiments reveal that can differentially active phases HER/OER. In HER, Ni/Fe‐MnOOH metallic NiFe act *OH *H acceptors respectively accelerates dissociation subsequent Heyrovsky/Tafel step. While OER, significant Jahn‐Teller effect Mn 3+ induces surface reconstruction from Ni/Fe‐MnO 2 The formative high value 4+ modify M‐O hybridization activate lattice mechanism, which pivotal breaking restriction volcanic relationship reducing overpotential. These findings provide valuable design guidelines high‐performance multi‐functional electrocatalysts via engineering.

Language: Английский

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NiFe-based arrays with manganese dioxide enhance chloride blocking for durable alkaline seawater oxidation

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 64 - 72

Published: Jan. 13, 2025

Language: Английский

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Facile preparation of nickel foam supported transition metal catalysts and their electrocatalytic activity for oxygen evolution reaction

Materials Research Bulletin, Journal Year: 2025, Volume and Issue: 188, P. 113416 - 113416

Published: March 4, 2025

Language: Английский

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Multielectronic synergetic Hf-doped NiFe-LDH/NF for efficient bifunctional electrocatalytic OER/UOR

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 82, P. 724 - 732

Published: Aug. 3, 2024

Language: Английский

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Comprehensive Chlorine Suppression: Advances in Materials and System Technologies for Direct Seawater Electrolysis

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

Published: Jan. 22, 2025

Abstract Seawater electrolysis offers a promising pathway to generate green hydrogen, which is crucial for the net-zero emission targets. Indirect seawater severely limited by high energy demands and system complexity, while direct bypasses pre-treatment, offering simpler more cost-effective solution. However, chlorine evolution reaction impurities in lead severe corrosion hinder electrolysis’s efficiency. Herein, we review recent advances rational design of chlorine-suppressive catalysts integrated systems architectures chloride-induced corrosion, with simultaneous enhancement Faradaic efficiency reduction cost. Furthermore, directions are proposed durable efficient systems. This provides perspectives toward sustainable conversion environmental protection.

Language: Английский

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Modulating the electronic structure of NiFe layered double hydroxide via anion engineering for enhanced oxygen evolution

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 689, P. 137258 - 137258

Published: March 7, 2025

Language: Английский

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In-situ cathodic electrochemical activation enhances oxygen evolution performance of g-C3N4@S/NiFe-LDH heterojunctions

Sustainable materials and technologies, Journal Year: 2025, Volume and Issue: unknown, P. e01367 - e01367

Published: March 1, 2025

Language: Английский

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Development of Electrochemical Water Splitting with Highly Active Nanostructured NiFe Layered Double Hydroxide Catalysts: A Comprehensive Review

Catalysts, Journal Year: 2025, Volume and Issue: 15(3), P. 293 - 293

Published: March 20, 2025

Electrochemical water splitting is a feasible and effective method for attaining hydrogen, offering mechanism renewable energy solutions to combat the world’s crises due scarcity of fossil fuels. Evidently, viability stability electrocatalysts are fundamental electrochemical water-splitting process. However, net efficiency this process noticeably hindered by kinetic drawbacks related OER. Hence, NiFe LDH has been widely used as highly efficient OER HER catalyst material its unique nanostructure, tunable composition, favorable electronic structure. This review offers systematic analysis latest progress in fabrication functional catalysts associated strategies, structure optimizations, performance improvements. Special emphasis given understanding role nanostructure engineering increasing active site accessibility, enhancing effectiveness subsequent electron transfer, boosting intrinsic catalytic activity Moreover, we discuss influence doping, defects, formation heterostructures with other materials on activities LDHs. Additional accounts basic structures provided, along an enhanced theoretical based DFT studies LDH. limitations potential developments work focus need existing synthesis approaches, catalysts, their insertion into working processes. comprehensive current state research use foster improved development sustainable hydrogen sources future.

Language: Английский

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Construction of Fe doped Co4S3/Ni3S2 composite for efficient alkaline freshwater and seawater oxidation

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119098 - 119098

Published: March 1, 2025

Language: Английский

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Rationally designed flower like NiO/NiCo2O4 dual-phase composite for ultrasensitive detection of roxarsone sensor

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116830 - 116830

Published: April 1, 2025

Language: Английский

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