| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jiang, Z-T
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2021Physicochemical properties of geopolymer composites with DFT calculations of in-situ reduction of graphene oxidecitations
- 2021Very-few-layer graphene obtained from facile two-step shear exfoliation in aqueous solutioncitations
- 2021High temperature (up to 1200 °C) thermal-mechanical stability of Si and Ni doped CrN framework coatingscitations
- 2020Physico-chemical properties of CrMoN coatings - combined experimental and computational studiescitations
- 2020Tuning the morphology and redox behaviour by varying the concentration of Fe in a CoNiFe ternary oxide heterostructure for hybrid devicescitations
- 2020Sol-gel derived ITO-based bi-layer and tri-layer thin film coatings for organic solar cells applicationscitations
- 2020Role of additives in electrochemical deposition of ternary metal oxide microspheres for supercapacitor applicationscitations
- 2019Nanorose-like ZnCo2O4 coatings synthesized via sol–gel route: Morphology, grain growth and DFT simulationscitations
- 2019Facile synthesis of a nanoporous sea sponge architecture in a binary metal oxidecitations
- 2019Biocompatibility study of multi-layered hydroxyapatite coatings synthesized on Ti-6Al-4V alloys by RF magnetron sputtering for prosthetic-orthopaedic implant applicationscitations
- 2018Understanding the impacts of Al +3 -substitutions on the enhancement of magnetic, dielectric and electrical behaviors of ceramic processed nickel-zinc mixed ferrites: FTIR assisted studiescitations
- 2018Conductive composites of tapioca based bioplastic and electrochemical-mechanical liquid exfoliation (emle) graphenecitations
- 2018Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applicationscitations
- 2017Improving the optoelectronic properties of titanium-doped indium tin oxide thin filmscitations
- 2017Electrodeposition of polypyrrole and reduced graphene oxide onto carbon bundle fibre as electrode for supercapacitorcitations
- 2017Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatingscitations
- 2017Investigation of the post-annealing electromagnetic response of Cu–Co oxide coatings via optical measurement and computational modellingcitations
- 2017Probing the effects of thermal treatment on the electronic structure and mechanical properties of Ti-doped ITO thin filmscitations
- 2016Structural thermal stability of graphene oxide-doped copper-cobalt oxide coatings as a solar selective surfacecitations
- 2016Effects of annealing temperatures on the morphological, mechanical, surface chemical bonding, and solar selectivity properties of sputtered TiAlSiN thin filmscitations
- 2016Structural, optical, and mechanical properties of cobalt copper oxide coatings synthesized from low concentrations of sol-gel processcitations
- 2016Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered TixM1−x−yNyfilmscitations
- 2016Understanding the structural, morphological and optical features of Mo, CrN and CrMoN sputtered films
- 2016Optoelectronic properties of spin coated titanium doped indium tin oxide thin films
- 2016Conversion of NO into N2 over γ-Mo2Ncitations
- 20153d transition metal oxide based sol-gel derived coatings for photothermal applications
- 2014Understanding local bonding structures of Ni-doped chromium nitride coatings through synchrotron radiation NEXAFS spectroscopycitations
- 2014Review of sol-gel derived mixed metal oxide thin film coatings with the addition of carbon materials for selective surface applicationscitations
- 2014Phase transition in CrxAl(1-x)N coating at high temperatures
Places of action
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article
Tuning the morphology and redox behaviour by varying the concentration of Fe in a CoNiFe ternary oxide heterostructure for hybrid devices
Abstract
The effect of the incorporation of a third transition metal cation (Fe–O) and its concentration on the configuration of cobalt nickel oxide has been studied. An attempt has been made to synthesize hierarchical porous cobalt–nickel–iron ternary oxide heterostructure arrays by a simple two-step approach, which is a novel galvanostatic electrochemical technique, followed by calcination. The synthesized ternary oxide heterostructures have been targeted as an electrode for hybrid capacitor application due to their high redox potentials. A diaphragm cell was used for the electrodeposition of the ternary hydroxide at room temperature from a nitrate bath of the corresponding metal ions at a pH of 2. A series of experiments was carried out with a fixed concentration of Co (30 g dm−3) and Ni (30 g dm−3) while varying the concentration of Fe (10, 20 and 30 g dm−3) at the optimized pH of 2. The electrodeposited ternary metal hydroxides were calcined at an optimum temperature of 300 °C for 2 h to obtain the ternary oxide heterostructure. The formation of the ternary oxide heterostructure has been confirmed by X-ray diffraction analysis. The field emission scanning electron microscopy images suggest the formation of a hierarchical nanoflower architecture consisting of an interconnected flower petal with a porous surface and spherical nano crystallites at various Fe concentrations. Transmission electron microscopy supports the formation of nano crystallites with the size of ∼20 nm. Elemental analysis of the ternary oxides was carried out by using atomic absorption spectrophotometry, which suggests that all the materials contain Co, Ni, and Fe in various ratios. The result showed that with an increase in Fe concentration from 10 to 30 g dm−3 with the fixed concentration of Co and Ni, the % iron content in the ternary composite increases with a decrease in the concentration of Co and Ni. The increasing concentration of Fe in the metal oxide decreases the specific capacitance from 440 F g−1 to 272 F g−1, indicating a significant difference in the observed redox processes. However, the cycling stability for both these samples showed an excellent retention of over 92% after 1000 cycles.