Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption

Wang, Shanshan; Xu, Yingchun; Fu, Ruru; Zhu, Huanhuan; Jiao, Qingze; Feng, Tongying; Feng, Caihong; Shi, Daxin; Li, Hansheng; Zhao, Yun

doi:10.1007/s40820-019-0307-8

Cited by 154 publications

(62 citation statements)

References 66 publications

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“…This mesoporous nano-sheet possesses a large specific surface area to expose more catalytic active sites and enhance the activity for WE. Additionally, it can increase the contact area with electrolyte to accelerate the release of H 2 /O 2 bubbles and improve the performance for WE at high current density [ 26 , 28 ].…”

Section: Resultsmentioning

confidence: 99%

N-Doped Graphene-Decorated NiCo Alloy Coupled with Mesoporous NiCoMoO Nano-sheet Heterojunction for Enhanced Water Electrolysis Activity at High Current Density

et al. 2021

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Developing highly effective and stable non-noble metal-based bifunctional catalyst working at high current density is an urgent issue for water electrolysis (WE). Herein, we prepare the N-doped graphene-decorated NiCo alloy coupled with mesoporous NiCoMoO nano-sheet grown on 3D nickel foam (NiCo@C-NiCoMoO/NF) for water splitting. NiCo@C-NiCoMoO/NF exhibits outstanding activity with low overpotentials for hydrogen and oxygen evolution reaction (HER: 39/266 mV; OER: 260/390 mV) at ± 10 and ± 1000 mA cm−2. More importantly, in 6.0 M KOH solution at 60 °C for WE, it only requires 1.90 V to reach 1000 mA cm−2 and shows excellent stability for 43 h, exhibiting the potential for actual application. The good performance can be assigned to N-doped graphene-decorated NiCo alloy and mesoporous NiCoMoO nano-sheet, which not only increase the intrinsic activity and expose abundant catalytic activity sites, but also enhance its chemical and mechanical stability. This work thus could provide a promising material for industrial hydrogen production.

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Section: Resultsmentioning

confidence: 99%

N-Doped Graphene-Decorated NiCo Alloy Coupled with Mesoporous NiCoMoO Nano-sheet Heterojunction for Enhanced Water Electrolysis Activity at High Current Density

et al. 2021

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“…Wang et al prepared FeCo/N-doped carbon/rGO by carbonization Fe-doped ZIF-67/rGO. The nanocomposite exhibited a RL value of − 43.26 dB with the thickness of 2.5 mm, corresponding to a EAB of 9.12 GHz [ 134 ].…”

Section: Carbon-based Mof Derivatives For Emw Absorption Applicationsmentioning

confidence: 99%

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

et al. 2021

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To tackle the aggravating electromagnetic wave (EMW) pollution issues, high-efficiency EMW absorption materials are urgently explored. Metal–organic framework (MOF) derivatives have been intensively investigated for EMW absorption due to the distinctive components and structures, which is expected to satisfy diverse application requirements. The extensive developments on MOF derivatives demonstrate its significantly important role in this research area. Particularly, MOF derivatives deliver huge performance superiorities in light weight, broad bandwidth, and robust loss capacity, which are attributed to the outstanding impedance matching, multiple attenuation mechanisms, and destructive interference effect. Herein, we summarized the relevant theories and evaluation methods, and categorized the state-of-the-art research progresses on MOF derivatives in EMW absorption field. In spite of lots of challenges to face, MOF derivatives have illuminated infinite potentials for further development as EMW absorption materials.

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“…For microwave absorption (MA) materials, the complex permittivity and permeability occupy a vital position, which determines material capacity to store and loss electromagnetic waves energy. Generally, the MA performance is mightily governed by the overall effect of the intrinsic electrical and magnetic characteristics modulating by component, dimensional, electron conductivity, and electromagnetic balance [12][13][14][15]. Due to facile synthesis process, adjustable components, controllable shape, and suitable electromagnetic properties, MOF-derived MA materials have become research hotspots.…”

Section: Introductionmentioning

confidence: 99%

MOF-Derived Ni1−xCox@Carbon with Tunable Nano–Microstructure as Lightweight and Highly Efficient Electromagnetic Wave Absorber

et al. 2020

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Intrinsic electric-magnetic property and special nano-micro architecture of functional materials have a significant effect on its electromagnetic wave energy conversion, especially in the microwave absorption (MA) field. Herein, porous Ni1−xCox@Carbon composites derived from metal-organic framework (MOF) were successfully synthesized via solvothermal reaction and subsequent annealing treatments. Benefiting from the coordination, carbonized bimetallic Ni-Co-MOF maintained its initial skeleton and transformed into magnetic-carbon composites with tunable nano-micro structure. During the thermal decomposition, generated magnetic particles/clusters acted as a catalyst to promote the carbon sp2 arrangement, forming special core-shell architecture. Therefore, pure Ni@C microspheres displayed strong MA behaviors than other Ni1−xCox@Carbon composites. Surprisingly, magnetic-dielectric Ni@C composites possessed the strongest reflection loss value − 59.5 dB and the effective absorption frequency covered as wide as 4.7 GHz. Meanwhile, the MA capacity also can be boosted by adjusting the absorber content from 25% to 40%. Magnetic–dielectric synergy effect of MOF-derived Ni1−xCox@Carbon microspheres was confirmed by the off-axis electron holography technology making a thorough inquiry in the MA mechanism.

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Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption

Cited by 154 publications

References 66 publications

N-Doped Graphene-Decorated NiCo Alloy Coupled with Mesoporous NiCoMoO Nano-sheet Heterojunction for Enhanced Water Electrolysis Activity at High Current Density

N-Doped Graphene-Decorated NiCo Alloy Coupled with Mesoporous NiCoMoO Nano-sheet Heterojunction for Enhanced Water Electrolysis Activity at High Current Density

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

MOF-Derived Ni1−xCox@Carbon with Tunable Nano–Microstructure as Lightweight and Highly Efficient Electromagnetic Wave Absorber

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