Elucidating the construction and modulation of built-in electric field in the oxygen evolution reaction

Chemical Engineering Journal, Год журнала: 2024, Номер 492, С. 152241 - 152241

Опубликована: Май 14, 2024

Язык: Английский

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Built‐In Electric Field Enhancement Strategy Induced by Cross‐Dimensional Nano‐Heterointerface Design for Electromagnetic Wave Absorption

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 1, 2024

Abstract Nano‐heterointerface engineering has been demonstrated to influence interfacial polarization by expanding the interface surface area and constructing a built‐in electric field (BEF), thus regulating electromagnetic (EM) wave absorption. However, dielectric‐responsive mechanism of BEF needs further exploration enhance comprehensive understanding polarization, particularly in terms quantifying optimizing strength. Herein, “1D expanded 2D structure” carbon matrix is designed, semiconductor ZnIn 2 S 4 (ZIS) introduced construct carbon/ZIS heterostructure. The cross‐dimensional nano‐heterointerface design increases coupling sites induces an increase Fermi level difference on both sides modulate distribution charges, thereby strengthening at interface. synergistic effect leads excellent EM absorption performance (minimum reflection coefficient RC min = −67.4 dB, effective bandwidth EAB 6.0 GHz) This work introduces general modification model for enhancing inspires development new strategies functional materials with unique electronic behaviors through heterointerface engineering.

Язык: Английский

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Symmetrical Localized Built-in Electric Field by Induced Polarization Effect in Ionic Covalent Organic Frameworks for Selective Imaging and Killing Bacteria

ACS Nano, Год журнала: 2024, Номер 18(5), С. 4539 - 4550

Опубликована: Янв. 23, 2024

Photocatalytic materials are some of the most promising substitutes for antibiotics. However, antibacterial efficiency is still inhibited by rapid recombination photogenerated carriers. Herein, we design a cationic covalent organic framework (COF), which has symmetrical localized built-in electric field due to induced polarization effect caused electron-transfer reaction between Zn-porphyrin unit and guanidinium unit. Density functional theory calculations indicate that there electrophilic/nucleophilic region in COF structure, results from increased electron density around The formed local can further inhibit carriers driving transfer under light irradiation, greatly increases yield reactive oxygen species. This wrapped DSPE-PEG2000 selectively target lipoteichoic acid Gram-positive bacteria electrostatic interaction, be used selective discrimination imaging bacteria. Furthermore, this nanoparticle rapidly kill including 99.75% Staphylococcus aureus 99.77% Enterococcus faecalis at an abnormally low concentration (2.00 ppm) irradiation 20 min. work will provide insight into designing photoresponsive COFs through engineering charge behavior.

Язык: Английский

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Modulating Built‐In Electric Field Via N‐Doped Carbon Dots for Robust Oxygen Evolution at Large Current Density

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Constructing a built-in electric field (BIEF) within heterostructures has emerged as compelling strategy for advancing electrocatalytic oxygen evolution reaction (OER) performance. Herein, the p-n type nanosheet array heterojunction Ni2P-NCDs-Co(OH)2-NF are successfully prepared. The variation in interaction affinity between nitrogen N-doped carbon dots (NCDs) and Ni/Co induces charge redistribution Co Ni Ni2P-NCDs-Co(OH)2-NF-3 heterostructure, thereby enhancing intensity of BIEF, facilitating electron transfer, markedly improving OER activity. optimized electrocatalyst, Ni2P-NCDs-Co(OH)2-NF-3, demonstrates remarkably low overpotential 389 mV at 500 mA cm-2, alongsides small Tafel slope 65 dec-1, expansive electrochemical active surface area (ECSA), impedance, outstanding stability exceeding 425 h Faradaic efficiency up to 96%. In situ Raman spectroscopy density functional theoretical (DFT) calculations elucidate mechanism, revealing that enhanced BIEF optimizes adsorption energy Co3+ OH- weakened desorption during reaction. work ponieeringly employed NCDs regulator effectively tuning achieving superior performance under large current density, thus charting new pathways development high-efficiency electrocatalysts.

Язык: Английский

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Spin Symmetry Breaking‐induced Hubbard Gap Near‐Closure in N‐coordinated MnO2 for Enhanced Aqueous Zinc‐Ion Battery Performance

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(35)

Опубликована: Июнь 8, 2024

Transition metal oxides (TMOs) are promising cathode materials for aqueous zinc ion batteries (ZIBs), however, their performance is hindered by a substantial Hubbard gap, which limits electron transfer and battery cyclability. Addressing this, we introduce heteroatom coordination approach, using triethanolamine to induce axial N on Mn centers in MnO

Язык: Английский

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Configuration Design and Interface Reconstruction to Realize the Superior High‐Rate Performance for Sodium Layered Oxide Cathodes

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Abstract Charge transfer at the electrode/electrolyte interface and mass within electrode are two main factors affecting high‐rate performance of O3‐type layered oxide cathodes for sodium‐ion batteries. Here a multidimensional lanthurization strategy is proposed to construct surface LaCrO 3 heterostructure create Cr─O─La configuration NaCrO 2 . The electrified heterogeneous induces built‐in electric field accelerate charge interface. Meanwhile, in transition metal layer leads local aggregation, weakens interaction force between Na─O, reduces Na + migration barrier. This significantly improves electrochemical reaction kinetics structural reversibility cathode. As result, designed stoichiometric ratio 0.94 Cr 0.98 La 0.02 O exhibits remarkable rate (101.8 mAh g −1 40 C) as well outstanding cycling stability (83.1% capacity retention 20 C 2000 cycles) half‐cell, along with competitive full battery (89.3% after 500 cycles C). study provides promising route achieve presentation cathode materials high‐rate.

Язык: Английский

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WSe2/MoSe2 with a better-matched heterointerface dominating high-performance potassium/sodium storage

Rare Metals, Год журнала: 2024, Номер unknown

Опубликована: Июль 24, 2024

Язык: Английский

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Spin Symmetry Breaking‐induced Hubbard Gap Near‐Closure in N‐coordinated MnO2 for Enhanced Aqueous Zinc‐Ion Battery Performance

Angewandte Chemie, Год журнала: 2024, Номер 136(35)

Опубликована: Июнь 8, 2024

Abstract Transition metal oxides (TMOs) are promising cathode materials for aqueous zinc ion batteries (ZIBs), however, their performance is hindered by a substantial Hubbard gap, which limits electron transfer and battery cyclability. Addressing this, we introduce heteroatom coordination approach, using triethanolamine to induce axial N on Mn centers in MnO 2 , yielding N‐coordinated (TEAMO). This approach leverages the change of electronegativity disparity between ligands (O N) disrupt spin symmetry augment polarization. enhancement leads closure primarily driven intensified occupancy e g orbitals. The resultant TEAMO exhibit significant increase storage capacity, reaching 351 mAh −1 at 0.1 A . Our findings suggest viable strategy optimizing electronic structure TMO cathodes, enhancing potential ZIBs energy technology.

Язык: Английский

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Quantum Spin Exchange Interactions Trigger O p Band Broadening for Enhanced Aqueous Zinc‐Ion Battery Performance

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Сен. 21, 2024

Abstract The pressing demand for large‐scale energy storage solutions has propelled the development of advanced battery technologies, among which zinc‐ion batteries (ZIBs) are prominent due to their resource abundance, high capacity, and safety in aqueous environments. However, use manganese oxide cathodes ZIBs is challenged by poor electrical conductivity structural stability, stemming from intrinsic properties MnO 2 destabilizing effects ion intercalation. To overcome these limitations, our research delves into atomic‐level engineering, emphasizing quantum spin exchange interactions (QSEI). These essential modifying electronic characteristics, can significantly influence material efficiency functionality. We demonstrate through density functional theory (DFT) calculations that enhanced QSEI oxides broadens O p band, narrows band gap, optimizes both proton adsorption electron transport. Empirical evidence provided synthesis Ru−MnO nanosheets, display a marked increase achieving 314.4 mAh g −1 at 0.2 A maintaining capacity after 2000 cycles. Our findings underscore potential enhance performance TMO ZIBs, pointing new avenues advancing technology

Язык: Английский

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High-performance aqueous sodium-ion storage using scalable and surfactant-free flower-like manganese oxide/reduced graphene oxide electrodes

Journal of Power Sources, Год журнала: 2025, Номер 631, С. 236221 - 236221

Опубликована: Янв. 16, 2025

Язык: Английский

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