Hierarchical mesoporous network of amorphous α − Ni(OH)2 for high performance supercapacitor electrode material synthesized from a novel solvent deficient approach

Kore, Rohan M.; Lokhande, B. J.

doi:10.1016/j.electacta.2017.06.001

Cited by 44 publications

(12 citation statements)

References 33 publications

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“…Thus, the CME appears as a powerful tool to evaluate the properties of materials without additive (C, PTFE). The capacitance values are lower than that obtained by some authors for Ni(OH) 2 , 2338 F g −1 by Kore et al . or 2183 F g −1 by Aghazadeh .…”

Section: Discussioncontrasting

confidence: 72%

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y₂Ni₇ for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

et al. 2019

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For the first time, the nickel layer formed during the corrosion of intermetallic alloys with a stacked structure has been isolated. This nickel layer has been produced by chemical dealloying of Y 2 Ni 7 through a corrosion process in alkaline medium. This anisotropic and nanoporous phase has been fully characterized regarding its morphology, chemical and structural properties, as well as its electrochemical behavior. The metallic phase is made of interconnected nanocrystalline cubic nickel, showing preferential orientation and nanopores. A cavity microelectrode has been used in addition to classical methods using bulk electrodes for electrochemical investigations of the layer. This full characterization is of primary importance to better understand the behavior of metallic anodes in Ni-MH batteries upon cycling and to ensure a longer lifetime.

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Section: Discussioncontrasting

confidence: 72%

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y₂Ni₇ for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

et al. 2019

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“…Figure shows the CV curves at different scan rates. Following formula was used to calculate the specific capacitance (SC) of the prepared FEs from the CV curves

SC = \frac{C}{W} = \frac{\int_{V_{1}}^{V_{2}} I d v}{W false(V false) \frac{d V}{d t}}

It was observed that, the current integral goes on increasing with the increase in scan rate.…”

Section: Resultsmentioning

confidence: 99%

“…Following formula was used to calculate the specific capacitance (SC) of the prepared FEs from the CV curves. [21]…”

Section: Cyclic Voltammetric Studymentioning

confidence: 99%

Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Thokale

Kore

Kambale

et al. 2019

Macromolecular Symposia

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The present work elaborates the aqueous route synthesis of polyaniline (PAni) electrodes for supercapacitors using chemical bath deposition (CBD) method and study of effective of scan rate on the cyclic voltammetric (CV) behavior. In the synthesis work, 1 m aniline and 1 m H2SO4 were taken in 2:2 ratio and kept for constant stirring and 1 m aqueous solution of (NH4)2S2O8 was added slowly in it. Stainless steel substrates were immersed in the reaction bath at room temperature for 1 h. The formation of PAni was confirmed by FT‐IR spectroscopic study. XRD analysis confirms the amorphous nature of the prepared PAni thin films. Contact angle study shows the hydrophilic behavior of the PAni electrodes. Obtained electrodes were subjected to cyclic voltammetric study at various scan rate from 5 to 100 mV s–1 in 1 m KOH electrolyte. Observed maximum specific capacitance was 516.34 F g–1 at 5 mV s–1 scan rate.

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“…FT-IR analysis was performed to identify the present species in CuH_NWs/Cu, CuH_NWs@NiH_NSs/Cu, and CuH_NWs@Ce:NiH_NSs/Cu electrocatalysts (Figure S2). It is seen that all the electrocatalysts display the absorption bands corresponding to the O–H stretching vibrations of the hydrogen-bonded hydroxyl groups and water molecules (3564.3 and 3094.5 cm –1 ), the bending vibration of the O–H group in water molecules (1617.1 cm –1 ), the bending modes of the O–H group of lattice OH (1401.1 cm –1 ), the bending vibrations of the hydroxyl groups on metal oxides (1150.9 and 1086.6 cm –1 ), and the Cu–O bending vibration (687.71 cm –1 ). − This result reveals the presence of Cu(OH) 2 species in CuH_NWs/Cu, CuH_NWs@NiH_NSs/Cu, and CuH_NWs@Ce:NiH_NSs/Cu electrocatalysts. Differently, an addition absorption small peak at 644.10 cm –1 is observed in the FT-IR spectra of CuH_NWs@NiH_NSs/Cu and CuH_NWs@Ce:NiH_NSs/Cu electrocatalysts, being attributed to the bending vibration of Ni-O, which implies the successful coating of NiH_NSs on the surface of CuH_NWs in CuH_NWs@NiH_NSs/Cu and CuH_NWs@Ce:NiH_NSs/Cu electrocatalysts .…”

Section: Results and Discussionmentioning

confidence: 99%

Regulating the Electronic Structure of Ni Sites in Ni(OH)₂ by Ce Doping and Cu(OH)₂ Coupling to Boost 5-Hydroxymethylfurfural Oxidation Performance

Ren

Liu

et al. 2023

Inorg. Chem.

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Biomass is a sustainable and renewable resource that can be converted into valuable chemicals, reducing the demand for fossil energy. 5-Hydroxymethylfurfural (HMF), as an important biomass platform molecule, can be converted to high-value-added 2,5-furandicarboxylic acid (FDCA) via a green and renewable electrocatalytic oxidation route under mild reaction conditions, but efficient electrocatalysts are still lacking. Herein, we rationally fabricate a novel self-supported electrocatalyst of core−shellstructured copper hydroxide nanowires@cerium-doped nickel hydroxide nanosheets composite nanowires on a copper mesh (CuH_NWs@Ce:NiH_NSs/Cu) for electrocatalytically oxidizing HMF to FDCA. The integrated configuration of composite nanowires with rich interstitial spaces between them facilitates fast mass/electron transfer, improved conductivity, and complete exposure of active sites. The doping of Ce ions in nickel hydroxide nanosheets (NiH_NSs) and the coupling of copper hydroxide nanowires (CuH_NWs) regulate the electronic structure of the Ni active sites and optimize the adsorption strength of the active sites to the reactant, meanwhile promoting the generation of strong oxidation agents of Ni 3+ species, thereby resulting in improved electrocatalytic activity. Consequently, the optimal CuH_NWs@Ce:NiH_NSs/Cu electrocatalyst is able to achieve a HMF conversion of 98.5% with a FDCA yield of 97.9% and a Faradaic efficiency of 98.0% at a low constant potential of 1.45 V versus reversible hydrogen electrode. Meanwhile, no activity attenuation can be found after 15 successive cycling tests. Such electrocatalytic performance suppresses most of the reported Cu-based and Ni-based electrocatalysts. This work highlights the importance of structure and doping engineering strategies for the rational fabrication of high-performance electrocatalysts for biomass upgrading.

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Hierarchical mesoporous network of amorphous α − Ni(OH)2 for high performance supercapacitor electrode material synthesized from a novel solvent deficient approach

Cited by 44 publications

References 33 publications

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y₂Ni₇ for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y₂Ni₇ for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Regulating the Electronic Structure of Ni Sites in Ni(OH)₂ by Ce Doping and Cu(OH)₂ Coupling to Boost 5-Hydroxymethylfurfural Oxidation Performance

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Hierarchical mesoporous network of amorphous α − Ni(OH)2 for high performance supercapacitor electrode material synthesized from a novel solvent deficient approach

Cited by 44 publications

References 33 publications

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y2Ni7 for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y2Ni7 for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

Aqueous Route Synthesis of PAni Electrodes by Chemical Bath Deposition and Their Cyclic Voltammetric Analyses at Different Scan Rates

Regulating the Electronic Structure of Ni Sites in Ni(OH)2 by Ce Doping and Cu(OH)2 Coupling to Boost 5-Hydroxymethylfurfural Oxidation Performance

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Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y₂Ni₇ for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

Anisotropic Nanoporous Nickel Obtained through the Chemical Dealloying of Y₂Ni₇ for the Comprehension of Anode Surface Chemistry of Ni‐MH Batteries

Regulating the Electronic Structure of Ni Sites in Ni(OH)₂ by Ce Doping and Cu(OH)₂ Coupling to Boost 5-Hydroxymethylfurfural Oxidation Performance