A sensitive hydrazine hydrate sensor based on a mercaptomethyl-terminated trinuclear Ni(<scp>ii</scp>) complex modified gold electrode

Gu, Xiaosong; Liang, Xian; Wu, Sijie; Shi, Jing; Jiang, Guoqing; Jiang, G. J.; Tian, Shu

doi:10.1039/c5ra23809a

Cited by 46 publications

(17 citation statements)

References 36 publications

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“…Catalytic currents are dominated by the rate of the reduction of hydrogen peroxide at the surface of the modified electrodes. The slopes of the plots were used to calculate the catalytic rate constants according to equation 6 .

\frac{I_{c a t}}{I_{b u f}} = γ^{1 / 2} π^{1 / 2} = π^{1 / 2} {((), k C t)}^{1 / 2}

…”

Section: Resultsmentioning

confidence: 99%

Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi‐walled Carbon Nanotubes and Gold Nanoparticles

Shumba

Nyokong

2016

Electroanalysis

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Glassy carbon electrodes were modified with composites containing cobalt tetraaminophenoxy phthalocyanine nanoparticles (CoTAPhPcNP), multi‐walled carbon nanotubes (MWCNT) and gold nanorods (AuNRs). The modified electrodes were studied for their electrocatalytic behavior towards the reduction of hydrogen peroxide. Phthalocyanine nanoparticles significantly improved electron transfer kinetics as compared to phthalocyanines which are not in the nanoparticle form when alone or in the presence of multiwalled carbon nanotubes (MWCNTs). CoTAPhPcNP‐MWCNT‐GCE proved to be suitable for hydrogen peroxide detection with a catalytic rate constant of 3.45×103 M−1 s−1 and a detection limit of 1.61×10−7 M. Adsorption Gibbs free energy ΔGo was found to be −19.22 kJ mol−1 for CoTAPhPcNP‐MWCNT‐GCE.

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\frac{I_{c a t}}{I_{b u f}} = γ^{1 / 2} π^{1 / 2} = π^{1 / 2} {((), k C t)}^{1 / 2}

…”

Section: Resultsmentioning

confidence: 99%

Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi‐walled Carbon Nanotubes and Gold Nanoparticles

Shumba

Nyokong

2016

Electroanalysis

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“…The gradients obtained from the graphs in Figure 8B were used to calculate the catalytic rate constants based on equation 6 [50]:…”

Section: Chronoamperometrymentioning

confidence: 99%

Electrocatalytic Activity of Asymmetrical Cobalt Phthalocyanines in the Presence of N Doped Graphene Quantum Dots: The Push‐pull Effects of Substituents

et al. 2019

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A series of Co phthalocyanine (CoPc) derivatives and their respective nitrogen doped graphene quantum dot conjugates were used as catalysts towards the electrooxidation of hydrazine. Using a glassy carbon electrode as a support for the electrocatalysts, through cyclic voltammetry and chronoamperometry, the effects of combining the CoPcs with the nitrogen doped graphene quantum dots (NGQDs) were studied. The general observations made were that the NGQDs improve the catalytic activity of the CoPcs in both the π‐π stacked and covalently linked conjugates by increasing the sensitivities and lowering the limits of detection with values as low as 0.43 μM being recorded.

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“…Unfortunately, hydrazine undergoes direct oxidation at the bare electrode surface, thus resulting in sluggish electrode kinetics and high over potentials [14,15]. Therefore, chemically modified electrodes have been used to detect hydrazine, which significantly reduce the overpotential, as well as accelerate redox reactions and hence the oxidation current responses [16,17].…”

Section: Introductionmentioning

confidence: 99%

Iron-Doped Titanium Dioxide Nanoparticles As Potential Scaffold for Hydrazine Chemical Sensor Applications

et al. 2020

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Herein, we report the fabrication of a modified glassy carbon electrode (GCE) with high-performance hydrazine sensor based on Fe-doped TiO 2 nanoparticles prepared via a facile and low-cost hydrothermal method. The structural morphology, crystalline, crystallite size, vibrational and scattering properties were examined through different characterization techniques, including FESEM, XRD, FTIR, UV-Vis, Raman and photoluminescence spectroscopy. FESEM analysis revealed the high-density synthesis of Fe-doped TiO 2 nanoparticles with the average diameter of 25 ± 5 nm. The average crystallite size of the synthesized nanoparticles was found to be around 14 nm. As-fabricated hydrazine chemical sensors exhibited 1.44 µA µM −1 cm −2 and 0.236 µM sensitivity and limit of detection (LOD), respectively. Linear dynamic ranged from 0.2 to 30 µM concentrations. Furthermore, the Fe-doped TiO 2 modified GCE showed a negligible inference behavior towards ascorbic acid, uric acid, glucose, SO 4 2− , NO 3 − , Pb 2+ and Ca 2+ ions on the hydrazine sensing performance. Thus, Fe-doped TiO 2 modified GCE can be efficiently used as an economical, easy to fabricate and selective sensing of hydrazine and its derivatives.

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A sensitive hydrazine hydrate sensor based on a mercaptomethyl-terminated trinuclear Ni(ii) complex modified gold electrode

Cited by 46 publications

References 36 publications

Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi‐walled Carbon Nanotubes and Gold Nanoparticles

Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi‐walled Carbon Nanotubes and Gold Nanoparticles

Electrocatalytic Activity of Asymmetrical Cobalt Phthalocyanines in the Presence of N Doped Graphene Quantum Dots: The Push‐pull Effects of Substituents

Iron-Doped Titanium Dioxide Nanoparticles As Potential Scaffold for Hydrazine Chemical Sensor Applications

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