Electrochemical study of spinel oxide systems with nominal compositions Ni 1− x Cu x Co 2 O 4 and NiCo 2− y Cu y O 4

Tavares, Ana C.; Cartaxo, M.A.M.; Pereira, M. I. da Silva; Costa, F.M.

doi:10.1007/s100089900091

Cited by 48 publications

(12 citation statements)

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“…Table 1 reports the (Cu/Fe) atomic ratio determined by XPS. The data shows that there is a strong segregation of copper species to the surface of the NPs, as often observed on copper spinel oxides [41][42][43][44][45]57,58], and that this enrichment increases with…”

Section: Methodsmentioning

confidence: 83%

“…ions. The existence of Cu + ions on the surface of spinel oxides was reported before [41,57,58]. Table 1 reports the (Cu/Fe) atomic ratio determined by XPS.…”

Section: Methodsmentioning

confidence: 93%

“…The resolution of the main peak reveals the presence of two copper species. According to the data in the literature concerning NiCo 2-y Cu y O 4 and Ni 1-x Cu x Co 2 O 4 oxides[41], the peaks at ca. 933.4 eV can be identified as Cu 2+ ions in octahedral coordination and the peak at ca.…”

mentioning

confidence: 96%

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Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Barros

Steter

Lanza

et al. 2016

Applied Catalysis B: Environmental

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Section: Methodsmentioning

confidence: 83%

“…ions. The existence of Cu + ions on the surface of spinel oxides was reported before [41,57,58]. Table 1 reports the (Cu/Fe) atomic ratio determined by XPS.…”

Section: Methodsmentioning

confidence: 93%

See 1 more Smart Citation

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Barros

Steter

Lanza

et al. 2016

Applied Catalysis B: Environmental

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“…More recently, ternary nickel cobaltite (NiCo2O4) has attracted considerable research attention due to its low cost, environmental friendliness, and high theoretical capacitance [36][37][38][39][40]. By having access to contributions from both nickel and cobalt ions, ternary NiCo2O4 also exhibits higher electrochemical activity, richer redox reactions, and significantly better electrical conductivity (over two orders of magnitude greater) compared to its corresponding binary oxides NiO and Co3O4 [24,35,[41][42][43]. However, despite possessing a relatively greater conductivity than its binary counterparts, ternary NiCo2O4 still suffers from limited rate performance [44,45].…”

Section: Introductionmentioning

confidence: 99%

NiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors

Wang

Xia

Wei

et al. 2016

Electrochimica Acta

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Graphical abstract Highlights: NiCo2O4 nanostructures are prepared via simple hydrothermal method. Outer shell of TiN is then grown through conformal atomic layer deposition. Electrodes exhibit significantly enhanced rate capability with TiN coating. Solid-state polymer electrolyte is employed to improve cycling stability. Full devices show a stack power density of 58.205 mW cm -3 at 0.061 mWh cm -3 . AbstractTernary transition metal oxides such as NiCo2O4 show great promise as supercapacitor electrode materials. However, the unsatisfactory rate performance of NiCo2O4 may prove to be a major hurdle to its commercial usage. Herein, we report the development of NiCo2O4@TiN core-shell nanostructures for all-solid-state supercapacitors with significantly enhanced rate capability. We demonstrate that a thin layer of TiN conformally grown by atomic layer deposition (ALD) on NiCo2O4 nanofiber arrays plays a key role in improving their electrical conductivity, mechanical stability, and rate performance. Fabricated using the hybrid NiCo2O4@TiN electrodes, the symmetric all-solid-state supercapacitor exhibited an impressive stack power density of 58.205 mW cm -3 at a stack energy density of 0.061 mWh cm -3 . To the best of our knowledge, these values are the highest of any NiCo2O4-based all-solid-state supercapacitor reported. Additionally, the resulting NiCo2O4@TiN all-solid-state device displayed outstanding cycling stability by retaining 70% of its original capacitance after 20,000 cycles at a high current density of 10 mA cm -2 . These results illustrate the promise of ALD-assisted hybrid NiCo2O4@TiN electrodes for sustainable and integrated energy storage applications.

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“…Cu-M (transition metals) composite oxides have been studied extensively as catalysts for CO oxidation, such as CuO-CeO 2 [19,20], CuO-Co 3 O 4 [21], and CuO-TiO 2 [22]. Besides serving as the catalyst for CO oxidation, Cu-Co composite oxides have been investigated as anode for lithium-ion batteries [23,24]. In addition, CuO and Co 3 O 4 nanoparticles were used as photocatalysts for chemical pollutants degradation [4,25].…”

Section: Introductionmentioning

confidence: 99%

Preparation, electrocatalytic and photocatalytic performances of nanoscaled CuO/Co3O4 composite oxides

Pan

Zhang

2010

J Mater Sci: Mater Electron

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Cu-Co composite oxides with different Cu/Co atomic ratios were prepared by the calcination of the precursors synthesized via a co-precipitation method. The samples were characterized by XRD, SEM and TEM, respectively. The XRD analysis revealed that only spinel structure of Cu-Co composite oxide was confirmed with lower Cu/Co ratio (\1:2). The sizes and morphologies of samples are controlled significantly by the Cu/Co atomic ratios. The electrocatalytic activity for p-nitrophenol reduction in a basic solution with the samples decorated on glassy carbon (GC) electrodes was tested by cyclic voltammetry (CV). The results showed that the sample with Cu/Co ratio of 2:8 exhibited the highest catalytic activity for p-nitrophenol reduction. The photocatalytic performances of the samples for the degradation of methyl orange under irradiation of visible light were investigated. The samples with Cu/Co ratios from 5:5 to 10:0 all showed better photocatalytic activities for methyl orange degradation, but the sample with Cu/Co ratio of 9:1 exhibited much higher catalytic activity. The catalyst with Cu/Co ratio of 9:1 also exhibited excellent repeatability for the catalytic degradation of methyl orange.

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Electrochemical study of spinel oxide systems with nominal compositions Ni 1− x Cu x Co 2 O 4 and NiCo 2− y Cu y O 4

Cited by 48 publications

References 0 publications

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

Catalytic activity of Fe3−Cu O4 (0 ≤x≤ 0.25) nanoparticles for the degradation of Amaranth food dye by heterogeneous electro-Fenton process

NiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors

Preparation, electrocatalytic and photocatalytic performances of nanoscaled CuO/Co3O4 composite oxides

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