Spinel‐Type Metal Oxides with Tailored Amorphous/Crystalline Heterointerfaces for Enhanced Electrocatalytic Water Splitting

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

Published: Aug. 15, 2024

Abstract Metal oxides with spinel structure have garnered increasing attention as promising alternatives to noble metal‐based electrocatalysts. However, these electrocatalysts often fail simultaneously exhibit high activity and stability for both hydrogen evolution reaction (HER) oxygen (OER), limiting their applications in electrocatalytic water splitting. Herein, crystalline/amorphous heterogeneous interfaces are successfully introduced into NiCo 2 O 4 nanosheets, which grown situ on carbon cloth (CC), denoted ‐B‐CC. The amorphous/crystalline heterostructures combine the advantages of phases amorphous phase nanosheets modulates electron density, provides abundant single vacancies active sites, enhances corrosion resistance, while crystalline improves conductivity. Density functional theory (DFT) calculations performed investigate influence surface vacancy (SV ) OER HER processes. NiCo₂O₄‐B‐CC exhibits overpotentials only 26 mV 215 at a current density 10 mA cm −2 . It excellent performance splitting, achieving 400 an applied voltage 2.0 V. construction novel approach enhancing metal

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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Synthesis bifunctional catalysts with amorphous NiFe-LDH/crystalline CoMo bimetallic phosphide heterojunction by electrodeposition for efficient water splitting

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 79, P. 73 - 85

Published: July 4, 2024

Language: Английский

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Advanced Microwave Strategies Facilitate Structural Engineering for Efficient Electrocatalysis

ChemSusChem, Journal Year: 2024, Volume and Issue: 17(12)

Published: Feb. 7, 2024

In the dynamic realm of energy conversion, demand for efficient electrocatalysis has surged due to urgent need seamlessly integrate renewable energy. Traditional electrocatalyst preparation faces challenges like poor controllability, elevated costs, and stringent operational conditions. The introduction microwave strategies represents a transformative shift, offering rapid response, high-temperature energy, superior controllability. Notably, non-liquid-phase advanced technology holds promise introducing novel models discoveries compared traditional liquid-phase methods. This review examines nuanced applications in structural engineering, emphasizing its pivotal role paradigm addressing conventional ensuing discussion explores profound impact on highlighting discernible advantages optimizing performance. Various techniques are comprehensively discussed, providing forward-looking perspective their untapped potential propel strides research. It provides perspective, delving into microwaves

Language: Английский

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Optimized Fabrication of Supercapacitor Using MOF-Derived NiCo₂O₄ with Porous Carbon as Cathode: Electrochemical Characterization and Stability Analysis using Time Series Analysis Technique

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(6), P. 4369 - 4380

Published: June 5, 2024

This study utilizes metal–organic framework (MOF)-derived NiCo2O4 with porous carbon (PC) as the cathode to fabricate both symmetric and asymmetric supercapacitor devices an optimized anode (NiCo2O4/PC, activated (AC), polyaniline (PANI)) aqueous electrolytes. Initially, NiCo2O4/PC material was synthesized from a bimetallic–organic (NiCo-BTC MOF) using carefully thermal conditions. Following comprehensive characterizations, employed in fabrication of solid-state by meticulously selecting electrode–electrolyte pair maximize performance. To achieve this, electrochemical characterizations NiCo2O4/PC/NF (NF: Ni foam) were carried out various The 1.0 M potassium hydroxide (KOH) electrolyte demonstrated most promising performance for composite. Subsequently, KOH-based gel evaluate three devices. These included two devices, NiCo2O4/PC/NF–AC/NF NiCo2O4/PC/NF–PANI/NF, well one device, NiCo2O4/PC/NF–NiCo2O4/PC/NF. Notably, NiCo2O4/PC/NF–PANI/NF device exhibited energy density almost 3.23 3.78 times higher than those NiCo2O4/PC/NF-NiCo2O4/PC/NF respectively. long-term stability system, analyzed over 2000 charge–discharge cycles time series analysis, reveals insights into its behavior extended duration. illustrated efficacy PANI (instead AC) MOF-derived material. Furthermore, aforementioned high-performing integrated power LED, demonstrating practical applicability.

Language: Английский

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Design and construction of metal sulfide/phosphide heterostructures with optimized d-band center and boosted electrocatalytic oxygen evolution

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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A critical review on amorphous–crystalline heterostructured electrocatalysts for efficient water splitting

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(24), P. 6254 - 6280

Published: Jan. 1, 2023

This review presents comprehensive details on recent developments in the fabrication of different amorphous–crystalline heterostructures, their compositions, and resulting physicochemical properties for OER, HER, overall water splitting.

Language: Английский

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Engineering of Self-Supported Electrocatalysts on a Three-Dimensional Nickel Foam Platform for Efficient Water Electrolysis

Transactions of Tianjin University, Journal Year: 2024, Volume and Issue: 30(2), P. 103 - 116

Published: April 1, 2024

Language: Английский

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Rich oxygen vacancy and amorphous/crystalline ruthenium-doped CoCu -layered double hydroxide electrocatalysts for enhanced oxygen evolution reactions

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 671, P. 283 - 293

Published: May 23, 2024

Language: Английский

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In situ surface reconstruction of heterostructure Ni2P/CoP/FeP4 nanowires network catalyst for high-current-density overall water splitting

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2024, Volume and Issue: 61, P. 269 - 280

Published: June 1, 2024

Language: Английский

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