Blockage of the Active Sites of a Platinum Electrode: Influence of Dissolved Molecular Oxygen on the Time Dependence of Blockage in the Methanol/Electrolyte/Rotating Disk Electrode System

1984 ◽  
Vol 131 (12) ◽  
pp. 2880-2887 ◽  
Author(s):  
Albert Marie de Ficquelmont ◽  
May Marie de Ficquelmont‐Loïzos
Keyword(s):  
Time Dependence ◽  
Molecular Oxygen ◽  
Active Sites ◽  
Platinum Electrode ◽  
Rotating Disk ◽  
Electrode System ◽  
Rotating Disk Electrode ◽  
Disk Electrode

scholarly journals Исследование транспорта кислорода в структурно-модифицированных электродах методом вращающегося дискового электрода

2021 ◽  
Vol 91 (7) ◽  
pp. 1148
Author(s):  
Н.В. Глебова ◽  
А.О. Краснова ◽  
А.А. Нечитайлов
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Oxygen ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Carbon Electrodes ◽  
Two Dimensional ◽  
Structural Elements ◽  
Disk Electrode ◽  
Mixed Conductivity ◽  
Different Types

The features of the transfer of molecular oxygen in platinum-carbon electrodes with mixed conductivity containing structural-modifying additives with structural elements of different types: short and long carbon nanotubes with elongated structural elements with different length / diameter ratios and graphene-like materials with almost two-dimensional planes have been investigated using the methods of a stationary and rotating disk electrode.

scholarly journals Determination of Iron in Spinach Using Linear Sweep Voltammetry at Iodine-Coated Platinum Rotating Disk Electrode

2019 ◽  
Vol 102 (2) ◽  
pp. 666-668
Author(s):  
Mohammad Amayreh ◽  
Mohammed Khair Hourani
Keyword(s):  
Iron Content ◽  
Platinum Electrode ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Limiting Current ◽  
Disk Electrode ◽  
Voltammetric Analysis ◽  
Voltammetric Techniques ◽  
Steady State Current

Abstract Background: In contrast to the hyper-reactive platinum electrode, iodine-coated platinum electrode shows remarkable inertness toward adsorption and surface processes. For this reason, iodine-coated platinum electrode lends itself to interesting voltammetric applications. Hydrodynamic voltammetric analysis, one of the voltammetric techniques family, has many advantages over stationary voltammetric techniques inter aliathe steady state current and the higher sensitivity. Objective: The present work is aimed at utilization of iodine-coated platinum rotating disk electrode for analysis of iron in spinach.Methods: The developed method is based on a voltammetric sweep at an iodine-coated rotating-disk platinum electrode. The optimized experimental parameters included a potential scan from –0.20 to 0.85 V versus Ag/AgCl/[Cl-] = 1.0 M, 50 mV/s scan rate, and a rotation rate of 1000 rpm. Results: Oxidation of iron at the iodine-coated platinum rotating disk electrode was manifested by a wave at E1/2 = +0.72 V. The limiting current was found to exhibit an excellent linearity with the concentration of iron (R2 = 0.996). The detection limit was 0.0 7 ppm. A comparative analytical study on determination of iron content in spinach samples was conducted by the voltammetric method and ICP-OES method. Application of the paired t-test to the results indicated that the null hypothesis is valid at P = 0.05. Conclusions: A sensitive and selective validated method was developed for determination of iron content in spinach. Highlights: A simple, fast, and reliable voltammetric methodwas developed for iron analysis in spinach. The main feature of the developed method is removing the effect of cationic interferences.

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