Electrochemical Properties of N'-Ferrocenylmethyl-N'-Phenylbenzohydrazide in Aqueous and Organic Mediums

Nacer, Salah Neghmouche; Lanez, Touhami

doi:10.56431/p-x61d82

Cited by 1 publication

(1 citation statement)

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“…As for most electrochemical sensors, diffusion is the primary mode by which the analyte is brought to the sensor interface; therefore, strategies to reduce the diffusion layer thickness are usually employed to increase mass transport rates and enhance the sensitivity. These includes wall-jet electrodes [4,5], channel electrodes [6][7][8], sono-electrodes [9,10], rotating disk electrodes [11][12][13], Scanning Electrochemical Microscope (SECM) [14][15][16] and pressure [17]. Among the strategies, an elegant approach is to employ a mediator species, which can react with the products formed at the electrode surface during the detection of the target analyte, regenerating the latter near the sensor surface.…”

Section: Introductionmentioning

confidence: 99%

Increased Sensitivity of Ascorbate Detection by Mediated Oxidation in Confined Electrochemical Cells

et al. 2022

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In this work, the EC' mechanism involving ascorbate (AA À ) and the oxidized form of ferrocenemethanol (FcMeOH) was explored as an analytical strategy to monitor AA À at low concentration levels. The feasibility of this approach was investigated at different mass transport regimes utilizing macro-(glassy carbon) and ultramicroelectrodes (5 μm radius carbon disk). Cyclic voltammograms (CV) were recorded in acetate buffer solution (pH 3.7) using a glassy carbon electrode, and an expressive increase in the anodic peak current (and decrease in the cathodic peak) was noticed in the CV in a solution containing both FcMeOH and ascorbate, con-firming the presence of an electrocatalytic process (EC'). The current increase was more pronounced when the reactants and products were confined in a thin solution layer, which was created by approaching an ultramicroelectrode close to an insulator surface. At optimized experimental conditions, a correlation between ascorbate concentration and the steady-state current measured at the ultramicroelectrode was established, allowing the development of an analytical method for ascorbate detection in the micromolar range. The proposed approach was used to quantify ascorbate in a commercial juice sample.

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