Fishbone-like Ni3S2/Co3S4 integrated with nickel MOF nanosheets for hybrid supercapacitors

Pan, Yi; Shi, Chenjing; Chen, Yanjun; Li, Dan; Tian, Zhen; Guo, Li; Wang, Yanzhong

doi:10.1016/j.apsusc.2021.150744

Cited by 40 publications

(17 citation statements)

References 45 publications

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“…The morphology of Cu-MOF is shown (Figure a,b and Figure S6) by FESEM at different magnifications; it shows a flowerlike microsphere. − The morphology of the Cu-MOF was retained even after 5000 cycles of GCD experiments and is shown in Figure c,d. , This type of morphology allows the electrolyte ions to penetrate deeply into the active material and thus improved electrochemical performance can be obtained.…”

Section: Resultsmentioning

confidence: 95%

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Jana

Saha

Chandra

et al. 2022

Crystal Growth & Design

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A Cu(II) coordinated metal–organic framework, {[Cu4(BTC)2(4-APy)2(μ3-OH)2]·[(CH3OH)0.5]2·(H2O)2} n (Cu-MOF), has been synthesized by the solvo-diffusion of Cu(NO3)2 to an alcoholic solution of 4-aminopyridine (4-APy) and 1,3,5-benzenetricarboxylic acid (H3BTC) in equimolar proportion. A single-crystal X-ray structure determination suggests that the four-Cu(II)-connected motif ([CuII]4) via edge sharing of two Cu3–O cores and bridging by six acetato functions of the BTC3– connector generates two five-coordinated distorted-square-pyramidal CuO5 units and two distorted-square-planar CuO4 units; the Cu(II) knot in the latter one (CuO4) is coordinated by pyridyl-N of 4-APy. The remaining donor centers of acetato-O of BTC3– bind adjacent [CuII]4 core to form an infinite 3D network structure. The coordination of CH3OH and H2O forms different hydrogen bonds to make a strong superstructure. A surface morphology determination shows a nanoflower pattern. The hybrid material Cu-MOF exhibits a very high specific capacitance, 547 F g–1, at a scan rate of 2 mV s–1 with excellent recycling stability (retains 97.4% after 5000 cycles). The χM T value for Cu-MOF at 300 K is 1.735 cm3 mol–1 K for four copper(II) ions, which is as expected for four isolated copper(II) ions with g = 2.15. The χM T values are almost constant until ca. 55 K, and then χM T decreases sharply, giving a minimum value of 0.753 cm3 K mol–1 at 2 K.

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Section: Resultsmentioning

confidence: 95%

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Jana

Saha

Chandra

et al. 2022

Crystal Growth & Design

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“…While performing CV measurements with Ni(Pz)-E-PVP and Ni(Pz)-E-SDS to further elaborate surface redox chemistry, curves characteristic of metal-based materials have been obtained, as shown in Figure S9a, indicating that both the materials undergo redox transitions before the onset of the OER . There is a distinct pair of redox peaks within the potential range of 1.0 to 1.6 V versus RHE, occurring mainly as a result of the Faradaic redox reactions Ni(II) ↔ Ni(III) + e – . It can be seen that the current intensity is higher for Ni(Pz)-E-PVP than that of Ni(Pz)-E-SDS, while the position of the redox peaks shifts positively for Ni(Pz)-E-PVP, indicating a faster adsorption rate for OH – on its surface and implying its good electrochemical/catalytic properties …”

Section: Resultsmentioning

confidence: 99%

Promoting the Oxygen Evolution Reaction via Morphological Manipulation of a Lamellar Nanorod-Assembled Ni(II)-Pyrazolate Superstructure

Farid

Mao

Ren

et al. 2022

ACS Appl. Mater. Interfaces

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Nanoscale pyrazolate-based coordination polymers (CPs) are becoming increasingly popular as electrocatalysts owing to their customizable compositions and structures. However, using them for oxygen evolution reaction (OER) is highly challenging due to their unsatisfactory catalytic efficiency and relatively low stability. Herein, a simple one-step solvothermal process was employed for the fabrication of polycrystalline nickel-pyrazolate [Ni(Pz)] with an unusual lamellar nanorod-assembled microsphere morphology for the first time using ethanol as a green organic solvent via controlling other physical parameters. Meanwhile, the Ni(Pz) structure and morphology are investigated to derive its formation process following the different monomeric feed ratios relying on the metal/ligand interactions of CP. Shaping the Ni(Pz) electrocatalyst in well-oriented lamellar nanorod-assembled microspheres brings the advantage of porosity and high specific surface area, which expedites mass/charge transport and contact with the electrolyte as well as creates less tortuous pathways for charge distribution, thus improving the charge homogeneity. These high-class structural features and polycrystalline nature of Ni(Pz)-E-PVP facilitate amazing catalytic OER activity with a low overpotential of 290 mV at 10 mA cm–2 and a Tafel slope of only 94 mV dec–1 beyond the yardstick material (i.e., RuO2) in alkaline solution. A suite of measurements, entailing X-ray photoelectron spectroscopy and density functional theory calculations, suggest that the rich Ni–N4 moieties in Ni(Pz)-E-PVP are central species providing adsorption sites for OER intermediates. This facile protocol is prophesied to commence the imminent development of noble metal-free, effective, and low-priced electrocatalysts for OER.

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“…Compared with that of NiMOF 180, the linear slopes of NiMOF/CNTs in the low-frequency region were closer to 45°, and the Warburg line of NiMOF/CNTs 180 was the longest, revealing its smaller Z w and faster ion diffusion kinetics. 23,24,26…”

Section: Resultsmentioning

confidence: 99%

CNTs support 2D NiMOF nanosheets for asymmetric supercapacitors with high energy density

Liao

Liu

et al. 2022

Dalton Trans.

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Fishbone-like Ni3S2/Co3S4 integrated with nickel MOF nanosheets for hybrid supercapacitors

Cited by 40 publications

References 45 publications

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

A Cu(II) Metal Organic Framework with a Tetranuclear Core: Structure, Magnetism, and Supercapacitor Activity

Promoting the Oxygen Evolution Reaction via Morphological Manipulation of a Lamellar Nanorod-Assembled Ni(II)-Pyrazolate Superstructure

CNTs support 2D NiMOF nanosheets for asymmetric supercapacitors with high energy density

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