Fabrication of a gold nanocage/graphene nanoscale platform for electrocatalytic detection of hydrazine

Daemi, Sahar; Bahari, Ali; Ghasemi, Shahram

doi:10.1016/j.snb.2017.01.137

Cited by 68 publications

(23 citation statements)

References 49 publications

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“…It is well known that the pH value of the solution is critical to the electro‐catalytic oxidation reactions of hydrazine. The results showed in supporting information (Figure S9–12) illustrated that the oxidation peak potential in CV curves for all 2D WO 3 films shift toward the negative direction when the pH of PBS increased from 5.8 to 7.8, consistent with the previous report ,. In addition, the peak current is also influenced by the value of pH, and the highest current response is exhibited in 7.4.…”

Section: Resultssupporting

confidence: 90%

“…Therefore, the rate‐determining step of hydrazine oxidation involves one electron tansfer and

α

was found to be 0.55. As a result, the oxidation of unprotonated forms of hydrazine involves one electron transfer in the first rate‐determining step, followed by the three electron transfer in fast second step ,. The corresponding oxidation reactions have been reported as Equations (2) and :

true N_{2} H_{4} + H_{2} normalO \to N_{2} H_{3} + H_{3} {normalO}^{+} + {normale}^{-} (slow)

true N_{2} H_{3} + {3 normalH}_{3} {normalO}^{+} \to N_{2} + {3 normalH}_{3} {normalO}^{+} + 3 {normale}^{-} (fast)

…”

Section: Resultsmentioning

confidence: 99%

“…The results showed in supporting information (Figure S9-12) illustrated that the oxidation peak potential in CV curves for all 2D WO 3 films shift toward the negative direction when the pH of PBS increased from 5.8 to 7.8, consistent with the previous report. [37,38] In addition, the peak current is also influenced by the value of pH, and the highest current response is exhibited in 7.4. Therefore, unless it stated otherwise all following tests were conducted in PBS with the pH value of 7.4.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the oxidation of unprotonated forms of hydrazine involves one electron transfer in the first rate-determining step, followed by the three electron transfer in fast second step. [37,41] The corresponding oxidation reactions have been reported as Equations (2) and (3):…”

Section: Resultsmentioning

confidence: 99%

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Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO₃

et al. 2017

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Wafer‐scale two‐dimensional (2D) WO3 films with different thicknesses of 0.78, 1.4, 3.6, and 6.5 nm were fabricated on Au‐SiO2/Si substrates using an atomic layer deposition technique. Their surface morphologies and chemical components were examined by field‐emission scanning electron microscopy, atomic force microscopy and X‐ray photoelectron spectroscopy. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy were utilized for the analysis of the electrochemical behavior of 2D WO3 films towards hydrazine detection under various conditions. The effect of the thickness of 2D WO3 on the electrochemical performance was also analyzed. Significant improvement in hydrazine sensing capabilities was obtained for monolayer 2D WO3 (0.78 nm), demonstrating a high sensitivity of 1.24 μA μM−1 cm−2, a linear hydrazine concentration detection ranging from 0.2 to 2100 μM, great long‐term stability, excellent selectivity and the lowest limit of detection of 0.015 μM reported to date, which provide a great potential method for materials fabrication in the development of high‐performance hydrazine detection.

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Section: Resultssupporting

confidence: 90%

“…Therefore, the rate‐determining step of hydrazine oxidation involves one electron tansfer and

α

true N_{2} H_{4} + H_{2} normalO \to N_{2} H_{3} + H_{3} {normalO}^{+} + {normale}^{-} (slow)

true N_{2} H_{3} + {3 normalH}_{3} {normalO}^{+} \to N_{2} + {3 normalH}_{3} {normalO}^{+} + 3 {normale}^{-} (fast)

…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO₃

et al. 2017

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“…However, those as‐synthesized nanograins are usually randomly aggregated leading to insufficient exposure of active surfaces to electrolyte. Therefore, many researchers composite metal nanograins with different substrates, such as graphene, carbon nanotubes, porous metal oxides, and so on . Metal particles dispersing on carbon or oxides are less likely to aggregate and collapse, which greatly improves their utilization efficiency and durability.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanograins with Pore-Array Architecture for the Electrochemical Detection of Hydrogen Peroxide

et al. 2017

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Building noble metallic nanograins into three‐dimensional architectures with large accessible surface area is of great significance in electrochemical fields. Here, we synthesized pore array architectured silver (pore array‐Ag) with nanograin size and three‐dimensional arrangement using butterfly‐wing scales as template by electroless deposition method. Efficient electrochemical detection performance was achieved for hydrogen peroxide with a sensitivity of 61.0 μA/(mM cm2) and detection limit of 33 μM. This work presents an exemplary strategy for fabricating elaborate metallic architectures for efficient electrodes by borrowing the structural design wisdom from nature.

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Gold Nanoparticles Decorated Graphene as a High Performance Sensor for Determination of Trace Hydrazine Levels in Water

et al. 2018

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Electrochemical sensors provide a selective, sensitive and an easy approach to detect hazardous substances such as hydrazine. Herein, we investigate a facile route for the fabrication of a nanostructured composite based on Au nanoparticles (AuNPs) decorated graphene and present its sensing performance towards hydrazine. Our strategy involves electrophoretic deposition (EPD) of graphene oxide (GO) on Au substrate to obtain a uniform layer EPD‐GO, followed by electrochemical reduction of GO to yield high quality graphene ERGO and electrodeposition of monodispersed AuNPs on ERGO (AuNPs/ERGO/Au). The modified AuNPs/ERGO/Au electrode was characterized using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT‐IR) techniques. The sensor exhibited an improved catalytic activity with a peak potential of +87 mV (vs. Ag/AgCl) for hydrazine oxidation. The high performance of this hybrid electrode is due to the presence of a synergistic effect between AuNPs and ERGO at their interface. Insights into the mechanism and kinetics of hydrazine oxidation are withdrawn from varying the voltage scan rate as the reaction is fully irreversible and diffusion‐controlled. The proposed hydrazine sensor showed suitability for nanomolar detection (detection limit of 74 nM), high selectivity in the presence of common ions and efficiency for application in water samples.

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Fabrication of a gold nanocage/graphene nanoscale platform for electrocatalytic detection of hydrazine

Cited by 68 publications

References 49 publications

Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO₃

Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO₃

Silver Nanograins with Pore-Array Architecture for the Electrochemical Detection of Hydrogen Peroxide

Gold Nanoparticles Decorated Graphene as a High Performance Sensor for Determination of Trace Hydrazine Levels in Water

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Fabrication of a gold nanocage/graphene nanoscale platform for electrocatalytic detection of hydrazine

Cited by 68 publications

References 49 publications

Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO3

Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO3

Silver Nanograins with Pore-Array Architecture for the Electrochemical Detection of Hydrogen Peroxide

Gold Nanoparticles Decorated Graphene as a High Performance Sensor for Determination of Trace Hydrazine Levels in Water

Contact Info

Product

Resources

About

Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO₃

Ultrasensitive, Sustainable, and Selective Electrochemical Hydrazine Detection by ALD‐Developed Two‐Dimensional WO₃