Preparation of electro-spun CuO nanoparticle and its application for hydrazine hydrate electro-oxidation

Hosseini, Sayed Reza; Kamali-Rousta, Mina

doi:10.1016/j.electacta.2015.12.070

Cited by 38 publications

(13 citation statements)

References 44 publications

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“…On the other hand, the chemical property of hydroxide makes it easy to be conversed to corresponding oxide and sulfide . The hydroxide, oxide as well as sulfide of aforementioned metals play indispensable roles in numerous electrochemical fields including pseudocapacitor, battery, fuel cell, and electrolytic tank, and electrochemical sensor . So, a series of binder‐free electrodes are possible to be prepared through such the green and economical corrosion route and play its function in aforementioned applications.

true {2 H}^{+} + 2 e \to H_{2}

true Ni + 2 H_{2} normalO \to {Ni (OH)}_{2} + H_{2}

…”

Section: Resultsmentioning

confidence: 99%

From Water and Ni Foam to a Ni(OH)₂@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

et al. 2017

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In this work, a Ni(OH)2@Ni foam binder‐free electrode was obtained through the corrosion of Ni foam with ultrapure water under hydrothermal conditions. The structure, morphology, and surface chemical states of the obtained Ni(OH)2@Ni foam were characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, and X‐ray photoelectron spectroscopy. The chemical formation mechanism is discussed. In addition, it was found that the loading amount and morphology of the deposited Ni(OH)2 depend largely on the corrosion time. Furthermore, electrodes corroded for different times were then directly used as working electrodes to investigate the areal and specific capacitances of the deposited Ni(OH)2 by using cyclic voltammetry, through which a relationship between the corrosion time, loading amount, morphology, and final capacitance is built up. The electrode with the highest areal capacitance was further studied with cyclic voltammetry, galvanostatic charge−discharge processes, as well as electrochemical impedance spectroscopy. The as‐prepared Ni(OH)2@Ni foam is a typical pseudocapacitance electrode. At a high current density of 5 mA cm−2, the electrode exhibits an areal capacitance of 0.863 F cm−2. For the deposited Ni(OH)2, its specific capacitance reaches 693 F g−1 at a current density of 4 A g−1. After 3000 charge−discharge cycles at a current density as high as 10 A g−1 (12.5 mA cm−2), the areal capacitance retains 77.3 % of its initial value. The findings in this work could be meaningful for the corrosion preparation of related electrodes and the design of binder‐free electrodes.

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true {2 H}^{+} + 2 e \to H_{2}

true Ni + 2 H_{2} normalO \to {Ni (OH)}_{2} + H_{2}

…”

Section: Resultsmentioning

confidence: 99%

From Water and Ni Foam to a Ni(OH)₂@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

et al. 2017

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“…Therefore, it displays poor catalytic performance toward AOR experimentally [20]. Cupric oxide (CuO) is a promising p-type semiconductor and has been investigated in various applications such as photocatalytic hydrogen production [21], dye degradation [22], electro-oxidation of hydrazine [23][24][25], methanol oxidation [26], and so on. Recently, the oxidation behavior of CuO-modified TiO 2 was investigated for ammonia (0.5 M H 2 SO 4 + 0.1 M NH 3 ) by using linear sweep voltammetry [1].…”

Section: Introductionmentioning

confidence: 99%

Electro-Oxidation of Ammonia over Copper Oxide Impregnated γ-Al2O3 Nanocatalysts

et al. 2021

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Ammonia electro-oxidation (AEO) is a zero carbon-emitting sustainable means for the generation of hydrogen fuel, but its commercialization is deterred due to sluggish reaction kinetics and the poisoning of expensive metal electrocatalysts. With this perspective, CuO impregnated γ-Al2O3 (CuO/γ-Al2O3) hybrid materials were synthesized as effective and affordable electrocatalysts and investigated for AEO in alkaline media. Structural investigations were performed via different characterization techniques, i.e., X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS). The morphology of γ-Al2O3 support as interconnected porous structures rendered the CuO/γ-Al2O3 nanocatalysts with robust activity. The additional CuO impregnation resulted in the enhanced electrochemical active surface area (ECSAs) and diffusion coefficient and spiked the electrocatalytic performance for NH3 electrolysis. Owing to good values of diffusion coefficient for AEO, low bandgap, and availability of ample ECSA at higher CuO to γ-Al2O3 ratio, these proposed electrocatalysts were proved to be effective in AEO. Due to good reproducibility, electrochemical stability, and higher activity for ammonia electro-oxidation, CuO/γ-Al2O3 nanomaterials are proposed as efficient promoters, electrode materials, or catalysts in ammonia electrocatalysis.

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“…All of the diffraction peaks can be assigned to the monoclinic structured CuO, and the sharp peaks indicate that the sample was perfectly crystalized. The diffractions peaks appeared at 2θ values of 32.5°, 35.5°, 38.7°, 48.7°, 53.4°, 58.2°, 61.5, 65.81°, 68.1 and 72.3° agreeing with (−110), (002), (111), (−202), (020), (202), (−113), (022), (−220) and (311) crystal planes, which were in agreement with literatures . All the detectable peaks can be easily indexed to standard XRD pattern of CuO and there is a weak peak at 43.3°, which could be assigned to the (111) of Cu‐Cu 2 O crystals because a little of Cu 2+ was reduced to the zero valence copper at 200 °C.…”

Section: Resultsmentioning

confidence: 99%

The composite catalysts of Cu/Cu_xO nanoparticles supported on the carbon fibers were prepared for styrene oxidation reaction

Bai

2017

Applied Organom Chemis

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In this paper a novel simple method for preparing two different catalysts with variousvalences copper was reported. Carbon nanofibers supported copper-cuprous oxide nanoparticles (Cu-Cu 2 O NPs/CNFs) and copper oxide nanoparticles (CuO NPs/ CNFs) through electrospinning, adsorption and reduction in the high-pressure hydrogenation and the high-temperature calcination methods. These catalysts were investigated by a series of characterizations and were applied in reaction in nitrogen atmosphere, which had a good catalytic activity and selectivity of benzaldehyde for the reaction. Above all, the new study has been certified clearly, in which Cu-Cu 2 O NPs/CNFs and CuO NPs/CNFs composite catalysts enhanced the generation of benzaldehydeand the excellent catalytic properties were exhibited.

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Preparation of electro-spun CuO nanoparticle and its application for hydrazine hydrate electro-oxidation

Cited by 38 publications

References 44 publications

From Water and Ni Foam to a Ni(OH)₂@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

From Water and Ni Foam to a Ni(OH)₂@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

Electro-Oxidation of Ammonia over Copper Oxide Impregnated γ-Al2O3 Nanocatalysts

The composite catalysts of Cu/Cu_xO nanoparticles supported on the carbon fibers were prepared for styrene oxidation reaction

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Preparation of electro-spun CuO nanoparticle and its application for hydrazine hydrate electro-oxidation

Cited by 38 publications

References 44 publications

From Water and Ni Foam to a Ni(OH)2@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

From Water and Ni Foam to a Ni(OH)2@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

Electro-Oxidation of Ammonia over Copper Oxide Impregnated γ-Al2O3 Nanocatalysts

The composite catalysts of Cu/CuxO nanoparticles supported on the carbon fibers were prepared for styrene oxidation reaction

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From Water and Ni Foam to a Ni(OH)₂@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

From Water and Ni Foam to a Ni(OH)₂@Ni Foam Binder‐Free Supercapacitor Electrode: A Green Corrosion Route

The composite catalysts of Cu/Cu_xO nanoparticles supported on the carbon fibers were prepared for styrene oxidation reaction