Preparation of CuO/NiO composite nanofibers by electrospinning and their application for electro-catalytic oxidation of hydrazine

Hosseini, Sayed Reza; Ghasemi, Shahram; Kamali-Rousta, Mina

doi:10.1016/j.jpowsour.2017.01.083

Cited by 47 publications

(32 citation statements)

References 46 publications

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“…Conventionally, the diameters of the semicircle at higher frequency on the Nyquist curves indicate the values of charge transfer resistance (Rct) for electrochemical reactions. [45] Therefore, the results confirm that (Cu 0.9 Pd 0.1 )O nanobelts shows a better stability toward hydrazine oxidation reaction than CuO nanobelts. and 10 mM hydrazine at 1.25 V. As shown in Figure 6b, (Cu 0.9 Pd 0.1 )O exhibits a higher current density than that of CuO nanobelts after the hydrazine oxidation reaction reaching equilibrium.…”

Section: Resultssupporting

confidence: 61%

“…The fluctuations on the curves are caused by the N 2 gas bubbles generated on the electrode surface. [45] Therefore, the results confirm that (Cu 0.9 Pd 0.1 )O nanobelts shows a better stability toward hydrazine oxidation reaction than CuO nanobelts.…”

Section: Resultssupporting

confidence: 61%

“…[45] Figure 6a Insert images in (c) and (d) represent the linear fitting curves between the peak current density (mA cm À 2 ) and the square root of the scan rate (ν 1/2 ). Conventionally, the diameters of the semicircle at higher frequency on the Nyquist curves indicate the values of charge transfer resistance (Rct) for electrochemical reactions.…”

Section: Resultsmentioning

confidence: 99%

“…Conventionally, the diameters of the semicircle at higher frequency on the Nyquist curves indicate the values of charge transfer resistance (Rct) for electrochemical reactions. [45] Figure 6a shows the EIS curves of CuO and (Cu 0.9 Pd 0.1 )O in 0.1 M KOH solution containing 10 mM hydrazine at open circuit potential with the frequency ranging from 1 to 10 6 Hz. As shown in Figure 6a the linear fitting curves between the peak current density (mA cm À 2 ) and the square root of the scan rate (ν 1/2 ).…”

Section: Resultsmentioning

confidence: 99%

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CuPd Alloy Oxide Nanobelts as Electrocatalyst Towards Hydrazine Oxidation

2019

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Among non-precious metal catalysts for the hydrazine oxidation reaction, Cu-based catalysts have exhibited relatively high performance ascribed to their lower onset potential and better stability. However, the catalytic properties, including activity and durability, still need further improvement in contrast to noble metal catalysts such as Pt and Pd. In this study, Pd was used as the promotor between Cu and Pd towards the hydrazine oxidation reaction. The CuPd alloy oxide ((Cu 0.9 Pd 0.1 ) O) nanobelts were fabricated by using a dealloying method. The electrochemical measurements show that (Cu 0.9 Pd 0.1 )O nanobelts exhibit 1.5 times higher current density, and better stability than CuO towards the hydrazine electro-oxidation reaction. These improvements are further evidenced in the direct hydrazine-hydrogen peroxide fuel cell by using these two catalysts as the anodes in comparison. A single fuel cell using (Cu 0.9 Pd 0.1 )O as the anode exhibits a peak power density of 330 mW cm À 2 , about 100 mW cm À 2 higher than that of pure CuO. N 2 sorption experiments and product analysis demonstrate that alloying with Pd not only could enlarge the surface area of (Cu 0.9 Pd 0.1 )O but also could suppress the self-decomposition of hydrazine. These improvements will consequently increase the catalytic activity and fuel efficiency of (Cu 0.9 Pd 0.1 )O.

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Section: Resultssupporting

confidence: 61%

Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

“…Conventionally, the diameters of the semicircle at higher frequency on the Nyquist curves indicate the values of charge transfer resistance (Rct) for electrochemical reactions. [45] Figure 6a shows the EIS curves of CuO and (Cu 0.9 Pd 0.1 )O in 0.1 M KOH solution containing 10 mM hydrazine at open circuit potential with the frequency ranging from 1 to 10 6 Hz. As shown in Figure 6a the linear fitting curves between the peak current density (mA cm À 2 ) and the square root of the scan rate (ν 1/2 ).…”

Section: Resultsmentioning

confidence: 99%

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CuPd Alloy Oxide Nanobelts as Electrocatalyst Towards Hydrazine Oxidation

2019

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“…Electrospinning is a simple and low cost way to fabricate ultrathin nanofibers, which has been a promising technique in various fields including air filtration, water purification, tissue scaffolds, catalysis, flexible electronic, microwave absorption, high sensitivity sensing, and energy storage . Nevertheless, the low productivity and nonuniform collection of nanofibers are the main limitations for its industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Multinozzle high efficiency electrospinning with the constraint of sheath gas

Zheng

Jiang

Chen

et al. 2019

J of Applied Polymer Sci

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In this article, sheath gas is introduced to design a novel multinozzle spinneret to improve the productivity of uniform nanofibers. The sheath gas in laminar flow provides an additional stretching force to overcome the mutual interferences among the nozzles, thus the simultaneous ejection of multiple jets is promoted. In addition, the sheath gas also contributes to the decrease of the diameter and the diameter distribution range of nanofibers. With the constraint of sheath gas, the productivity of nanofibers is 0.618‐0.712 g·h−1, which is about 30‐50 times as high as that from traditional electrospinning. The dynamic properties of the gas–liquid surface are investigated as well. A bead‐on‐strain model based on Maxwell theory is built up to study the motion and rheology behaviors of multiple jets, and the simulation results verify the experimental results well. The proposed method will accelerate the industrial applications of uniform electrospun nanofibrous membrane. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47574.

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Application of Electrospun Materials in Catalysis

Filiz

2020

Electrospun Materials and Their Allied Applications

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Preparation of CuO/NiO composite nanofibers by electrospinning and their application for electro-catalytic oxidation of hydrazine

Cited by 47 publications

References 46 publications

CuPd Alloy Oxide Nanobelts as Electrocatalyst Towards Hydrazine Oxidation

CuPd Alloy Oxide Nanobelts as Electrocatalyst Towards Hydrazine Oxidation

Multinozzle high efficiency electrospinning with the constraint of sheath gas

Application of Electrospun Materials in Catalysis

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