Microwave-assisted exploration of the electron configuration-dependent electrocatalytic urea oxidation activity of 2D porous NiCo2O4 spinel

Journal of Energy Chemistry, Год журнала: 2023, Номер 91, С. 226 - 235

Опубликована: Дек. 28, 2023

Urea holds promise as an alternative water-oxidation substrate in electrolytic cells. High-valence nickel-based spinel, especially after heteroatom doping, excels urea oxidation reactions (UOR). However, traditional spinel synthesis methods with prolonged high-temperature lack kinetic precision, hindering the balance between controlled doping and highly active two-dimensional (2D) porous structures design. This significantly impedes identification of electron configuration-dependent sites doped 2D spinels. Herein, we present a microwave shock method for preparation NiCo2O4 spinel. Utilizing transient on-off property pulses precise structural design, non-metal (boron, phosphorus, sulfur) distinct extranuclear disparities serves straightforward examples investigation. Precise tuning lattice parameter reveals impact covalent bond strength on stability. The introduced defect levels induce unpaired d-electrons transition metals, enhancing adsorption electron-donating amino groups molecules. Simultaneously, Bode plots confirm mechanism rapid migration caused by reduced band gaps UOR activity. prepared phosphorus-doped NiCo2O4, optimal configuration control, outperforms most reported modification strategy advances understanding theoretical structure-activity mechanisms high-performance spinels UOR.

Язык: Английский

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Metastable 2D amorphous Nb2O5 for aqueous supercapacitor energy storage

Chemical Engineering Journal, Год журнала: 2024, Номер 488, С. 150912 - 150912

Опубликована: Апрель 1, 2024

Nb2O5 is a promising electrode material of energy storage due to its high specific capacity and phase transition resistance. However, the facile generation niobic acid poses challenge, hindering controlled growth impeding improvements in electrical conductivity structural stability, especially realizing two-dimensional (2D) Nb2O5. Herein, we have discerned that addition hexamethylenetetramine (HMTA) ethanol solvent facilitates restricted metastable 2D amorphous (a-Nb2O5) within graphene domains. Nitrogen atoms HMTA, rich lone pair electrons, strongly interact with niobium ions, promoting on interface. This unique interface offers surface area, enhanced electron mobility, rapid ion transport, superior stability compared crystalline counterparts. The prepared a-Nb2O5/rGO exhibits unprecedented cycle life aqueous asymmetric supercapacitor. confined strategy novel approach for innovative design materials.

Язык: Английский

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Benchmarking stable Electrocatalysts for green hydrogen production: A chemist perspective

Coordination Chemistry Reviews, Год журнала: 2024, Номер 521, С. 216112 - 216112

Опубликована: Авг. 24, 2024

Electro-induced water splitting module is a fascinating strategy for the conversion of electricity into scalable and clean H 2 as future energy carrier has significantly attracted attention scientific community. Despite countless research on electrolyzers, cost-effective durable electrode materials with high efficiency remain challenge dream in this quest. This critical review devoted to systemically presenting upsurge recently rationally explored highly stable benchmark electrocatalysts (both noble non-noble) understand design principles, performances, compelling reasons/chemistry behind enhanced catalytic potential over traditional half-cell oxygen evolution reaction (OER) hydrogen (HER). Moreover, (at least ≥50 h) their bi-functional conduct evaluated prototype electrolyzer integrated photovoltaic (PV) or batteries at laboratory level are discussed, yet an untold unsummarized story electrochemical splitting. Next, current status technology, socio-economic challenges, possible solutions, key considerations fundamental principles/concepts scheme outlined from point practical application. Typical challenges regarding identifying, preparing, scaling electrocatalysts, but foundations now strong, outlook visible exciting next-generation technology. • Critical Benchmark Understanding performances mechanistic studies scrutiny technology Long term stability electrocatalyst Full cell investigation PV integration

Язык: Английский

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Microwave-pulse synthesis of tunable 2D porous nickel-enriched LaMn_xNi_1−xO₃ solid solution for efficient electrocatalytic urea oxidation

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(12), С. 7047 - 7057

Опубликована: Янв. 1, 2024

This work proposes a microwave-pulse method for rapidly synthesizing highly tunable 2D porous nickel-enriched LaMn x Ni 1− O 3 comprehensive understanding of UOR activity mechanisms.

Язык: Английский

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Advanced Microwave Strategies Facilitate Structural Engineering for Efficient Electrocatalysis

ChemSusChem, Год журнала: 2024, Номер 17(12)

Опубликована: Фев. 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

Язык: Английский

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3D printing driving innovations in extreme low-temperature energy storage

Virtual and Physical Prototyping, Год журнала: 2025, Номер 20(1)

Опубликована: Фев. 6, 2025

Extreme low-temperature environments, such as those in aerospace, polar expeditions, and deep-sea exploration, demand efficient energy storage systems. Conventional technologies face major limitations under these conditions, including electrolyte freezing, restricted interfacial reaction kinetics, microstructural instability. In contrast, 3D printing offers transformative solutions with precise control, multifunctional material integration, optimisation, effectively addressing challenges related to compatibility structural complexity. However, the mechanisms for optimising performance remain poorly understood, of processes materials needs further exploration. Moreover, comprehensive integration materials, processes, device designs remains an ongoing challenge. This review systematically summarises key their characteristics storage, exploring potential pathways through which enhances performance. Particular emphasis is placed on its unique applications design, engineering, multi-material coupling. Unlike studies focused single or technologies, this adopts interdisciplinary systematic framework, linking properties optimisation. It provides critical theoretical guidance practical insights advancing scientific understanding engineering extreme technologies.

Язык: Английский

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WO3-x as an activation medium to prompt overall water splitting of NiFe-based electrocatalyst

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 669, С. 53 - 63

Опубликована: Апрель 29, 2024

Язык: Английский

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Leveraging novel microwave techniques for tailoring the microstructure of energy storage materials

Microstructures, Год журнала: 2024, Номер 4(3)

Опубликована: Июнь 3, 2024

In the dynamic landscape of energy storage materials, demand for efficient microstructural engineering has surged, driven by imperative to seamlessly integrate renewable energy. Traditional material preparation methods encounter challenges such as poor controllability, high costs, and stringent operational conditions. The advent microwave techniques heralds a transformative shift, offering rapid responses, high-temperature energy, superior controllability. This review critically examines nuanced applications technology in tailoring microstructure emphasizing its pivotal role paradigm addressing posed conventional methods. Notably, non-liquid-phase advanced holds promise introducing novel models discoveries compared traditional liquid-phase ensuing discussion explores profound impact strategies on engineering, highlighting discernible advantages optimizing performance applications. Various this domain are comprehensively discussed, providing forward-looking perspective their untapped potential propel strides research. offers insights into promising future leveraging microwaves materials.

Язык: Английский

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Rare Earth‐Induced CoO₆ Octahedral Distortion in Perovskite: An Efficient Catalytic Platform for RuO₂‐Catalyzed Water Oxidation

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 22, 2024

Abstract Rare earth (RE)‐based perovskites are considered as promising platform for oxygen evolution reaction (OER) due to their low cost and tunable structures. However, the systematic synthesis of perovskite catalysts with satisfactory performance has rarely been reported. Herein, a general synthetic protocol RE‐substituted LaCoO 3 (RE‐LCO) is demonstrated. Particularly, after loaded RuO 2 , as‐prepared :0.2Ce‐LCO hybrid structures exhibit OER overpotential 135 mV at 10 mA cm −2 in 1.0 m KOH, together remarkable long‐term operation, representing one most efficient robust Ru‐based catalysts. Comprehensive experimental results indicate that enhanced mechanism attributed Ce‐substitution, which alters geometric configuration CoO 6 octahedra generates more vacancies. Furthermore, interaction between Ce‐LCO stabilizes valence state Ru site. Theoretical calculations corroborate Co 3d orbitals overlap Ce 4f near Fermi level, greatly improving electron transfer atoms.

Язык: Английский

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The interaction of carbon nanotubes (CNTs) with CuCoO₂ nanosheets promotes structural modification and enhances their OER performance

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(12), С. 3482 - 3493

Опубликована: Янв. 1, 2024

The interaction of CNTs with CuCoO 2 increases the oxygen vacancy concentration and activates lattice oxygen, which promotes simultaneous occurrence AEM LOM improves OER performance.

Язык: Английский

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