Electrochemical behaviour of benzylamine, 2-phenylethylamine and 4-hydroxyphenylethylamine at gold. A comparative study

Łuczak, Teresa

doi:10.1007/s10800-007-9396-z

Cited by 17 publications

(8 citation statements)

References 55 publications

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“…The ratio of m/n at ERGO/GCE was calculated to be approximately 1, suggesting that the equal numbers of protons and electrons were transferred in both electrochemical oxidation reactions of OA and TA. The results were consistent with the reported electrochemical mechanism that three protons and three electrons are involved in the electrochemical oxidation of OA and TA [ 26 , 48 , 49 ]. Figure 5 illustrates a possible process for electrochemical oxidation of OA and TA at the surface of ERGO/GCE.…”

Section: Resultssupporting

confidence: 92%

An Easily Fabricated Electrochemical Sensor Based on a Graphene-Modified Glassy Carbon Electrode for Determination of Octopamine and Tyramine

Zhang

Wei

et al. 2016

Sensors

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A simple electrochemical sensor has been developed for highly sensitive detection of octopamine and tyramine by electrodepositing reduced graphene oxide (ERGO) nanosheets onto the surface of a glassy carbon electrode (GCE). The electrocatalytic oxidation of octopamine and tyramine is individually investigated at the surface of the ERGO modified glassy carbon electrode (ERGO/GCE) by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Several essential factors including the deposition cycle of reduced graphene oxide nanosheets and the pH of the running buffer were investigated in order to determine the optimum conditions. Furthermore, the sensor was applied to the quantification of octopamine and tyramine by DPV in the concentration ranges from 0.5 to 40 μM and 0.1 to 25 μM, respectively. In addition, the limits of detection of octopamine and tyramine were calculated to be 0.1 μM and 0.03 μM (S/N = 3), respectively. The sensor showed good reproducibility, selectivity and stability. Finally, the sensor successfully detected octopamine and tyramine in commercially available beer with satisfactory recovery ranges which were 98.5%–104.7% and 102.2%–103.1%, respectively. These results indicate the ERGO/GCE based sensor is suitable for the detection of octopamine and tyramine.

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Section: Resultssupporting

confidence: 92%

An Easily Fabricated Electrochemical Sensor Based on a Graphene-Modified Glassy Carbon Electrode for Determination of Octopamine and Tyramine

Zhang

Wei

et al. 2016

Sensors

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“…The CBMs of ZrS 3 , ZrSS 2-x (15), and ZrS 1-y S 2-x (15/100) are higher than the potential for two-electron reduction of O 2 . Previous studies have shown that the oxidation potential of benzylamine lies higher than that of water, and the benzylamine oxidation was thus used to replace oxygen evolution reaction to couple with photocatalytic and electrocatalytic hydrogen evolution reaction 14 , 17 , 55 , 56 . This suggests the VBM of defective ZrS 3 NBs lying far below the oxidation potential of benzylamine, indicating that these photocatalysts are applicable to the photocatalytic O 2 reduction and benzylamine oxidation.…”

Section: Resultsmentioning

confidence: 99%

Efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation over defective ZrS3 nanobelts

et al. 2021

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Photocatalytic hydrogen peroxide (H2O2) generation represents a promising approach for artificial photosynthesis. However, the sluggish half-reaction of water oxidation significantly limits the efficiency of H2O2 generation. Here, a benzylamine oxidation with more favorable thermodynamics is employed as the half-reaction to couple with H2O2 generation in water by using defective zirconium trisulfide (ZrS3) nanobelts as a photocatalyst. The ZrS3 nanobelts with disulfide (S22−) and sulfide anion (S2−) vacancies exhibit an excellent photocatalytic performance for H2O2 generation and simultaneous oxidation of benzylamine to benzonitrile with a high selectivity of >99%. More importantly, the S22− and S2− vacancies can be separately introduced into ZrS3 nanobelts in a controlled manner. The S22− vacancies are further revealed to facilitate the separation of photogenerated charge carriers. The S2− vacancies can significantly improve the electron conduction, hole extraction, and kinetics of benzylamine oxidation. As a result, the use of defective ZrS3 nanobelts yields a high production rate of 78.1 ± 1.5 and 32.0 ± 1.2 μmol h−1 for H2O2 and benzonitrile, respectively, under a simulated sunlight irradiation.

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“…Then dry electrodes were located into clean the three-compartment electrochemical cell separated by glass frits which was used in electrochemical measurements. Electrochemical activation of the bare polycrystalline gold electrode was carried out as described earlier [47]. All measurements described were made at room temperature using solutions deoxygenated by 99.998% argon.…”

Section: Electrodesmentioning

confidence: 99%

A nanogold supported inorganic/organic hybrid 3D sensor for electrochemical quantification of propranolol—effective antagonist of β-adrenergic receptors

Łuczak

2019

Ionics

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The new hybrid inorganic/organic 3D nanogold electrode material composed of gold template, gold nanoparticles, 4mercaptobutyric acid, and cysteamine has been prepared and for the first time used for electrochemical oxidation and quantitative determination of propranolol, an effective antagonist of β-adrenergic receptors, in the buffered solution and in the simulated body fluids. A high improvement in electrooxidation of propranolol as compared to that observed on the unmodified gold was detected. The prepared sensor was found to give reliable results in the propranolol concentration range between 0.0001 and 0.02 mM with the detection limit of 6.75 × 10 −5 mM without any interference from biogenic species. A new inorganic/organic hybrid 3D nanogold sensor displays good sensitivity, repeatability, and stability which make it a promising tool for application both in clinical diagnosis and pharmaceutical analysis.

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Electrochemical behaviour of benzylamine, 2-phenylethylamine and 4-hydroxyphenylethylamine at gold. A comparative study

Cited by 17 publications

References 55 publications

An Easily Fabricated Electrochemical Sensor Based on a Graphene-Modified Glassy Carbon Electrode for Determination of Octopamine and Tyramine

An Easily Fabricated Electrochemical Sensor Based on a Graphene-Modified Glassy Carbon Electrode for Determination of Octopamine and Tyramine

Efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation over defective ZrS3 nanobelts

A nanogold supported inorganic/organic hybrid 3D sensor for electrochemical quantification of propranolol—effective antagonist of β-adrenergic receptors

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