Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Pawar, S.M.; Pawar, B.S.; Babar, Pravin; Ahmed, Abu Talha Aqueel; Chavan, Harish S.; Jo, Young‐Heon; Cho, Sangeun; Kim, Jongmin; Hou, Bo; Inamdar, Akbar I.; Nam, Seung; Kim, Jihun; Kim, Tae Geun; Kim, Hyungsang; Im, Hyunsik

doi:10.1016/j.apsusc.2018.11.151

Cited by 118 publications

(42 citation statements)

References 59 publications

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“…The long-term stability was measured using chronopotentiometry. The potentials were measured and calibrated to a reversible hydrogen electrode (RHE) and converted to the overpotential (η) using the Nernst equation: 26,31,32 The electrochemical impedance spectroscopy was measured at a biased potential of 300 mV with 10 mV AC amplitude over frequency range of 1 Hz-10 kHz. (Figure 2A).…”

Section: Electrochemical Measurementmentioning

confidence: 99%

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

et al. 2020

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Facile synthesis of highly efficient and low-cost electrocatalyst for oxygen evolution reaction (OER) is important for large-scale hydrogen production. Herein, nickel hydroxide/reduced graphene oxide (Ni(OH) 2 /rGO) composite thin film was fabricated using dip-coating followed by electrodeposition method on Ni foam substrate at room temperature. The deposited composite film shows amorphous nature with ultra-thin Ni(OH) 2 nanosheets vertically coated on rGO surface, which provides large electrochemical surface area and abundant catalytically active sites. It exhibits a low overpotential of 260 mV @10 mA cm −2 as compared to the pristine electrodes and excellent long-term stability up to 20 hours in 1 M KOH solution. The electrochemical active surface area and Tafel slope of the composite electrode are 20.2 mF cm −2 and 35 mV dec −1 , respectively. The superior water oxidation performance is a result of high catalytically active sites and improved conductivity of the composite electrode.

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Section: Electrochemical Measurementmentioning

confidence: 99%

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

et al. 2020

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“…Metal oxides of Al, Ti, Zr, and In with appropriate components are utilized in flexible devices based on their crystalline phases [ 20 ]. Compared to these oxide materials, nanoflakes, nanosheets, and nanowires of WO 3 based polymeric composites were employed efficiently in various usages such as sensitive gas sensors [ 21 , 22 ], dye-sensitized solar cells [ 23 ], lithium-ion batteries [ 24 ], photochromic agents [ 25 ], photocatalytic and antibacterial agents [ 26 , 27 ], supercapacitors [ 28 ], water splitting [ 29 , 30 ], wastewater treatment [ 31 ], dye removal [ 32 ], smart windows [ 33 ], and anticancer agents [ 34 ]. As a result of the properties of zinc oxide, it has appeared a potential interest in the formulation of nano-sized polymeric systems [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Properties, and Microbial Impact of Tungsten (VI) Oxide and Zinc (II) Oxide Nanoparticles Enriched Polyethylene Sebacate Nanocomposites

et al. 2021

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Nanoparticles of tungsten oxide (WO3) and zinc oxide (ZnO) enriched polyethylene sebacate (PES) nanocomposites were prepared through the coprecipitation process and condensation polymerization reaction. The obtained nano-sized particles of WO3 and ZnO, PES, and nanocomposites (WO3-PES NC and ZnO-PES NC) were investigated. The average molecular weight of the cured PES was measured by employing the gel permeation chromatography (GPC) technique. Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) spectra assured the formation of the polymeric nanocomposites.WO3 and ZnO nanoparticles supposed a condensed porous spherical phase found implanted in the polymer structure, as detected by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) methods. These nano-scale systems achieved an electrical activity based on the conductive nanoparticles embedded matrix as a result of the ion–ion interactions. The microbial influence of the nanocomposites was examined against pathogenic bacteria; Pseudomonas aeruginosa,Escherichia Coli, Staphylococcus Aureus, and Bacillus subtilis, and Fungi; Aspergillus niger, and Candidaalbicans. Results exhibited that these nanocomposites have antimicrobial effects from moderate to slightly high on bacteria and high on fungi which was confirmed by a clear zone of inhibition. This study contributes to the design of reasonable composites to be under evaluation for their catalytic effect.

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“…Hence, researchers have been taking tremendous efforts toward the development of superior, low-cost catalysts for water splitting. Several transition metal oxides/hydroxides [11][12][13][14][15] have demonstrated high OER performance, 16 while nitrides, 17 phosphides, 18 carbides, 19 and sulfides 18 showed their promising HER catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Template‐free synthesis of one‐dimensional cobalt sulfide nanorod array as an attractive architecture for overall water splitting

et al. 2020

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Summary One‐dimensional (1D) nanoarrays are beneficial for electrochemical reactions, including water splitting, due to their directional electron transport through the array, large effective surface area, and porosity. Fabrication of such array without a template is, however, extremely challenging. Herein, an ion‐exchange approach is employed to fabricate a 1D cobalt sulfide nanorod array (1D‐CoS) from Co3O4 on stainless steel. The 1D‐CoS electrode works as a bifunctional electrocatalyst, attaining the current density of 10 mA cm−2 for hydrogen evolution reaction and oxygen evolution reaction at a low overpotential of 159 and 280 mV, respectively in a 1 M KOH solution. A full electrolyzer with the same two 1D‐CoS electrodes assembly demonstrates a low cell voltage of 1.75 V at 10 mA cm−2 and this performance value is well maintained for 20 hours. The efficient catalytic performance can be due to the controlled CoS phase with a unique 1D nanoarchitecture, which allows facile electrolyte diffusion and charge transfer between electrode/electrolyte interface.

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Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Cited by 118 publications

References 59 publications

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

Synthesis of nickel hydroxide/reduced graphene oxide composite thin films for water splitting application

Preparation, Properties, and Microbial Impact of Tungsten (VI) Oxide and Zinc (II) Oxide Nanoparticles Enriched Polyethylene Sebacate Nanocomposites

Template‐free synthesis of one‐dimensional cobalt sulfide nanorod array as an attractive architecture for overall water splitting

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