Functional Tailoring of Multi‐Dimensional Pure MXene Nanostructures for Significantly Accelerated Electromagnetic Wave Absorption

Small, Год журнала: 2023, Номер 19(41)

Опубликована: Июнь 8, 2023

Transition metal carbide (Ti3 C2 Tx MXene), with a large specific surface area and abundant functional groups, is promising candidate in the family of electromagnetic wave (EMW) absorption. However, high conductivity MXene limits its EMW absorption ability, so it remains challenge to obtain outstanding attenuation ability pure MXene. Herein, by integrating HF etching, KOH shearing, high-temperature molten salt strategies, layered (L-MXene), network-like nanoribbons (N-MXene NRs), porous monolayer (P-MXene ML), layer L) are rationally constructed favorable microstructures states for HF, KOH, KCl/LiCl used functionalize tune microstructure state (F- , OH- Cl- terminals), thereby improving capacity MXene-based nanostructures. Impressively, unique structure, proper electrical conductivity, area, defects, nanostructures achieve good impedance matching, dipole polarization, conduction loss, thus inheriting excellent performance. Consequently, L-MXene, N-MXene NRs, P-MXene ML, L enable reflection loss (RL ) value -43.14, -63.01, -60.45, -56.50 dB matching thickness 0.95, 1.51, 3.83, 4.65 mm, respectively.

Язык: Английский

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Construction of dual heterogeneous interface between zigzag-like Mo–MXene nanofibers and small CoNi@NC nanoparticles for electromagnetic wave absorption

Journal of Advanced Ceramics, Год журнала: 2023, Номер 12(8), С. 1562 - 1576

Опубликована: Май 24, 2023

Two-dimensional (2D) transition metal carbides (MXene) process attractive conductivity and abundant surface functional groups, providing immense potential in the field of electromagnetic wave (EMW) absorption. However, high spontaneous aggregation MXene suffer from limited EMW response. Inspired by dielectric-magnetic synergy effect, strategy decorating with magnetic elements is expected to solve this challenge. In work, zigzag-like Mo₂TiC₂ nanofiber (Mo-MXene NFs) cross-linked networks are fabricated using HF etching KOH shearing processes. Subsequently, Co-MOF derived CoNi LDH ultrathin nanosheets grown inside Mo-MXene NFs, N-doped carbon matrix anchored alloy nanoparticles formed pyrolysis firmly embedded NFs network. Benefiting synergistic effect highly dispersed small nanoparticles, a 3D conductive network assembled numerous hollow vesicles, dual heterogeneous interface, designed Mo-MXene/CoNi-NC heterostructure provides robust absorption ability reflection loss (R_L) value -68.45 dB at matching thickness 4.38 mm. The performance can be attributed excellent dielectric losses, loss, impedance matching, multiple scattering triggered unique structure. This work puts up great developing advanced MXene-based devices.

Язык: Английский

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The component-activity interrelationship of cobalt-based bifunctional electrocatalysts for overall water splitting: Strategies and performance

Journal of Energy Chemistry, Год журнала: 2024, Номер 91, С. 453 - 474

Опубликована: Янв. 9, 2024

Язык: Английский

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Advances in 2D/2D MXenes-based heterostructures for energy storage/conversion applications

Journal of Material Science and Technology, Год журнала: 2024, Номер 202, С. 82 - 118

Опубликована: Март 29, 2024

Язык: Английский

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Heterostructured electrocatalysts for the oxygen evolution reaction

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(30), С. 18832 - 18865

Опубликована: Янв. 1, 2024

This review focuses mainly on the overall facilitating effect of heterostructures OER process. The fabrication heterostructured electrocatalysts and relationship between their structures electrocatalytic properties are discussed.

Язык: Английский

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Synergistically coupling CoS/FeS₂ heterojunction nanosheets on a MXene via a dual molten salt etching strategy for efficient oxygen evolution reaction

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(24), С. 14517 - 14530

Опубликована: Янв. 1, 2024

CoS/FeS 2 heterojunction nanosheets on a MXene with excellent electrocatalytic OER performance are realized by dual molten salt etching strategy.

Язык: Английский

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Dual template-derived 3D porous Co6Mo6C2/Mo2C@NC framework for electromagnetic wave response and multifunctional applications

Journal of Material Science and Technology, Год журнала: 2024, Номер 187, С. 15 - 27

Опубликована: Янв. 9, 2024

Язык: Английский

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Dual template-induced construction of three-dimensional porous SiO2/NC/Co-CNTs heterostructure with highly dispersed active sites for efficient oxygen evolution reaction

Tungsten, Год журнала: 2023, Номер 6(3), С. 585 - 595

Опубликована: Дек. 6, 2023

Язык: Английский

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Preparation and structure optimization of 2D MXene nanocomposites for microwave absorbing application

Materials Today Physics, Год журнала: 2023, Номер 40, С. 101291 - 101291

Опубликована: Ноя. 25, 2023

Язык: Английский

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Fe‐Induced Electronic Transfer and Structural Evolution of Lotus Pod‐Like CoNiFeP_x@P,N‐C Heterostructure for Sustainable Oxygen Evolution

Energy & environment materials, Год журнала: 2023, Номер 7(3)

Опубликована: Апрель 2, 2023

Transition metal phosphides with metallic properties are a promising candidate for electrocatalytic water oxidation, and developing highly active stable phosphide‐based oxygen evolution reaction catalysts is still challenging. Herein, we present facile ion exchange phosphating processes to transform intestine‐like CoNiP x @P,N‐C into lotus pod‐like CoNiFeP heterostructure in which numerous P,N‐codoped carbon‐coated nanoparticles tightly anchors on the 2D carbon matrix. Meanwhile, as‐prepared enables core‐shell structure, high specific surface area, hierarchical pore abundant heterointerfaces fully exposed sites. Notably, incorporation of Fe can also induce electron transfer @P,N‐C, thereby promoting reaction. Consequently, delivers low overpotential 278 mV (vs RHE) at current density 10 mA cm −1 inherits excellent long‐term stability no observable decay after 30 h chronoamperometry test. This work not only highlights heteroatom induction tune electronic structure but provides approach advanced electrocatalysts heterointerfaces.

Язык: Английский

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