Electrochemical properties of rice-like copper manganese oxide (CuMn2O4) nanoparticles for pseudocapacitor applications

Saravanakumar, B.; Lakshmi, S. Muthu; Ravi, G.; Ganesh, V.; Sakunthala, A.; Yuvakkumar, R.

doi:10.1016/j.jallcom.2017.06.249

Cited by 84 publications

(18 citation statements)

References 24 publications

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“…Lazarevic et al suggest that translational movement of the whole tetrahedron is the reason of these modes [58]. Saravanakumar et al support the idea of a Jahn-Teller effect of Cu(II) ions, which leads to a lowering lattice symmetry of F 2g mode [59]. Pekov et al correlate the presence of the strong band at 125 cm −1 with the lattice modes [60].…”

Section: Discussionmentioning

confidence: 96%

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

et al. 2020

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Mixed oxides were synthesized by co-precipitation of a Cu source in combination with Al, Fe or Mn corresponding salts as precursors. The materials were calcined at 600 and 1000 °C in order to crystallize the phases and to mimic the reaction conditions of the catalytic application. At 600 °C a mixed spinel structure was only formed for the combination of Cu and Mn, while at 1000 °C all the materials showed mixed spinel formation. The catalysts were applied in three-way catalysis using a reactor with a gas mixture containing CO, NO and O2. All the materials calcined at 600 °C displayed the remarkable ability to oxidize CO with O2 but also to reduce NO with CO, while the pure oxides such as CuO and MnO2 were not able to. The high catalytic activity at 600 °C was attributed to small supported CuO particles present and imperfections in the spinel structure. Calcination at 1000 °C crystallized the structure further which led to a dramatic loss in catalytic activity, although CuAl2O4 and CuFe2O4 still converted some NO. The materials were characterized by X-ray diffraction (XRD), Raman spectroscopy, H2-Temperatrue Programmed Reduction (H2-TPR), N2-sorption and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX).

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Section: Discussionmentioning

confidence: 96%

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

et al. 2020

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“…Aruchamy et al exhibited a Q s of 19.56 mAh g −1 from the ZnMn 2 O 4 ‐carbon nanotube composite at 0.1 A g −1 54 . Saravanakumar et al synthesized CuMn 2 O 4 nanoparticles, and a Q s of 77.05 mAh g −1 was obtained at 0.5 A g −1 55 . The specific capacity with current densities is depicted in Figure 4E.…”

Section: Resultsmentioning

confidence: 98%

Template and sol‐gel routed CoMn ₂ O ₄ nanofibers for supercapacitor applications

Bhagwan

Krishna

2021

Int J Energy Res

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Summary Nanofibrous CoMn2O4 materials are prepared by a simple and most adoptable sol‐gel process. To create the nanofabric morphology, small pieces of tissue paper are utilized as a template form. The prepared CoMn2O4 material was characterized by X‐ray diffraction, field‐emission scanning electron microscopy, Fourier‐transform infrared spectroscopy, Brunauer‐Emmett‐Teller, X‐ray photoelectron spectroscopy, and transmission electron microscopy techniques. Supercapacitive performance of the CoMn2O4 nanofibers was observed in an aqueous potassium hydroxide electrolyte, and a specific capacity of 134 mAh g−1 at 1 A g−1 was obtained. On the basis of the high energy storage performance of this material, an aqueous asymmetric supercapacitor (ASC) was assembled. The high power and energy density values of 0.725 kW kg−1 and 30 W h kg−1, respectively at 1 A g−1 were achieved. The ASCs can light up eleven light‐emitting diodes. Furthermore, a kitchen timer and a toy motor were also powered by the fabricated ASCs.

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“…The characterization techniques explored for the entire nanocatalysts were the same as that of the previous literature reports. 9,19,55−57…”

Section: Methodsmentioning

confidence: 99%

Bi₂WO₆ and FeWO₄ Nanocatalysts for the Electrochemical Water Oxidation Process

et al. 2019

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Polyvinylpyrrolidone (PVP)-assisted nanocatalyst preparation was succeeded by employing a controlled solvothermal route to produce efficient electrodes for electrochemical water-splitting applications. Bi 2 WO 6 and FeWO 4 nanocatalysts have been confirmed through the strong signature of (113) and (111) crystal planes, respectively. The binding natures of Bi–W–O and Fe–W–O have been thoroughly discussed by employing X-ray photoelectron spectroscopy which confirmed the formation of Bi 2 WO 6 and FeWO 4 . The freestanding nanoplate array morphology of Bi 2 WO 6 and the fine nanosphere particle morphology of FeWO 4 nanocatalysts were revealed by scanning electron microscopy images. With these confirmations, the fabrication of durable, long-term electrodes for electrochemical water splitting has been subjected to efficient oxidation of water, confirmed by obtaining 2.79 and 1.96 mA/g for 0.5 g PVP-assisted Bi 2 WO 6 and FeWO 4 nanocatalysts, respectively. The water oxidation mechanism of both nanocatalysts has been revealed with the support of 24 h stability test over continuous water oxidation and faster charge transfer achieved by the smaller Tafel slope values of 75 and 78 mV/dec, respectively. Generally, these nanocatalysts are utilized for photocatalytic applications. The present study revealed the PVP-assisted synthesis to produce electrocatalytically active nanocatalysts and their electrochemical water-splitting mechanism which will offer a pathway for research interests with regard to the production of multifunctional nanocatalysts for both electro- and photocatalytic applications in the near future.

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Electrochemical properties of rice-like copper manganese oxide (CuMn2O4) nanoparticles for pseudocapacitor applications

Cited by 84 publications

References 24 publications

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

Template and sol‐gel routed CoMn ₂ O ₄ nanofibers for supercapacitor applications

Bi₂WO₆ and FeWO₄ Nanocatalysts for the Electrochemical Water Oxidation Process

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Electrochemical properties of rice-like copper manganese oxide (CuMn2O4) nanoparticles for pseudocapacitor applications

Cited by 84 publications

References 24 publications

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

Copper-Containing Mixed Metal Oxides (Al, Fe, Mn) for Application in Three-Way Catalysis

Template and sol‐gel routed CoMn 2 O 4 nanofibers for supercapacitor applications

Bi2WO6 and FeWO4 Nanocatalysts for the Electrochemical Water Oxidation Process

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Product

Resources

About

Template and sol‐gel routed CoMn ₂ O ₄ nanofibers for supercapacitor applications

Bi₂WO₆ and FeWO₄ Nanocatalysts for the Electrochemical Water Oxidation Process