Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

Cho, Hyeon Woo; Nam, Ji Hyun; Park, Jeong Ho; Kim, Kwang Man; Ko, Jang Myoun

doi:10.5012/bkcs.2012.33.12.3993

Cited by 12 publications

(4 citation statements)

References 32 publications

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“…According to the literature [54,[63][64][65], the occurrence of peaks referring to hkl planes (1 1 1), (2 2 0), (3 1 1), (2 2 2), (4 0 0), (4 2 2), (5 1 1) and (4 4 0) can be attributed to the formation of the spinel NiCo 2 O 4 . Accordingly, the appearance of peaks referring to hkl planes (2 0 0), (2 2 0) and (3 1 1) can be ascribed to the formation of NiO dispersed in the oxide matrix mainly composed by the spinel NiCo 2 O 4 .…”

Section: Resultsmentioning

confidence: 95%

Fabrication and characterisation of a mixed oxide-covered mesh electrode composed of NiCo2O4 and its capability of generating hydroxyl radicals during the oxygen evolution reaction in electrolyte-free water

Faria

Ribeiro

Franco

et al. 2017

J Solid State Electrochem

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A mixed oxide-covered mesh electrode composed of NiCo 2 O 4 (MOME-NiCo 2 O 4 ) was prepared on a stainlesssteel substrate using thermal decomposition (slow-cooling rate method). Surface, bulk and electrochemical properties of MOME were studied using different techniques, namely scanning electron microscopy (SEM), X-ray diffraction (XRD), cyclic voltammetry (CV) with determination of the electrochemical porosity (ϕ) and morphology factor (φ) parameters, quasi-stationary polarisation curves (PC) and electrochemical impedance spectroscopy (EIS). SEM images revealed a good coverage of the metallic wires by a compact oxide layer (absence of cracks). XRD analysis confirmed the formation of the spinel NiCo 2 O 4 with the presence of NiO. The 'in situ' surface parameters denoted as ϕ and φ exhibited values of 0.39 and 0.33, respectively, revealing that the electrochemically active surface area is mainly confined to the 'outer/external' surface regions of the oxide layer. The PC was characterised by two Tafel slopes distributed in the low (b 1 = 46 mV dec −1 ) and high (b 2 = 59 mV dec −1 ) overpotential domains. The corresponding apparent exchange current densities were j 0(1) = (3.43 ± 0.11) × 10 −6 A cm −2 and j 0(2) = (6.70 ± 0.08) × 10 −6 A cm −2 , respectively. The EIS study accomplished in the low-overpotential domain revealed a Tafel slope (b 1 ) of 51 mV dec −1 . According to the spintrapping reaction using N,N-dimethyl-p-nitrosoaniline (RNO), the MOME-NiCo 2 O 4 electrode exhibited good performance for the generation of weakly adsorbed hydroxyl radicals (HO • ) during the OER in electrolyte-free water.Keywords Mixed oxide-covered mesh electrodes . Ni and Co oxides . Morphology factor and electrochemical porosity . Generation of hydroxyl radicalsHighlights • Mixed oxide-covered mesh electrodes containing Ni and Co (MOME-NiCo 2 O 4 ) were fabricated using a stainless-steel support;• The morphology factor (φ) and electrochemical porosity (ϕ) parameters confirmed the formation of a compact oxide layer; • A good performance for the generation of hydroxyl radicals was verified during the oxygen evolution reaction in the electrolyte-free water;• The MOME-NiCo 2 O 4 electrode is a promising candidate for the electrochemical combustion of organic pollutants in the electrolyte-free water.

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Section: Resultsmentioning

confidence: 95%

Fabrication and characterisation of a mixed oxide-covered mesh electrode composed of NiCo2O4 and its capability of generating hydroxyl radicals during the oxygen evolution reaction in electrolyte-free water

Faria

Ribeiro

Franco

et al. 2017

J Solid State Electrochem

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show abstract

“…Than silicon plates were sequentially treated for 10 min in concentrated HF, water, 70% HNO 3 , water, 0.1 M KOH and than flushed out by water. NF plates were treated according to the technique described in [11] for 15 min in 6 М HCl solution, then several times rinsed by water and dried on air at 120 1C for 30 min.…”

Section: Methodsmentioning

confidence: 99%

Direct synthesis of Ni2Al(OH)7−x(NO3)x·nH2O layered double hydroxide nanolayers by SILD and their capacitive performance

et al. 2015

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“…Then plates were sequentially treated for 10 min in concentrated HF, water, 70% HNO 3 , water, 0.1 M KOH and than flushed out by water. NF plates were treated according to the technique described in [23] for 15 min in 6 M HCl solution, then several times rinsed by water and dried on air at 120 • C for 30 min.…”

Section: Methodsmentioning

confidence: 99%

Direct synthesis of Co 2 Al(OH) 7−2x (CO 3 ) x · n H 2 O layered double hydroxide nanolayers by successive ionic layer deposition and their capacitive performance

Lobinsky¹,

Tolstoy²,

Gulina³

2014

Applied Surface Science

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Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

Cited by 12 publications

References 32 publications

Fabrication and characterisation of a mixed oxide-covered mesh electrode composed of NiCo2O4 and its capability of generating hydroxyl radicals during the oxygen evolution reaction in electrolyte-free water

Fabrication and characterisation of a mixed oxide-covered mesh electrode composed of NiCo2O4 and its capability of generating hydroxyl radicals during the oxygen evolution reaction in electrolyte-free water

Direct synthesis of Ni2Al(OH)7−x(NO3)x·nH2O layered double hydroxide nanolayers by SILD and their capacitive performance

Direct synthesis of Co 2 Al(OH) 7−2x (CO 3 ) x · n H 2 O layered double hydroxide nanolayers by successive ionic layer deposition and their capacitive performance

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