کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
221412 463396 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and electrocatalytic properties of the TBO/nafion chemically-modified electrodes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Preparation and electrocatalytic properties of the TBO/nafion chemically-modified electrodes
چکیده انگلیسی

The glassy carbon electrode modified with nafion and toluidine blue O (TBO) was prepared and their electrochemical properties were investigated. The TBO molecules were strongly and irreversibly adsorbed on the nafion-modified glassy carbon surface. The electrochemical behavior and mechanism for interactions of the TBO molecules with the nafion film were investigated through cyclic voltammetric and UV–vis spectra methods. The electrocatalytic reductions of nitric oxide and oxygen were performed at this modified electrode by cyclic voltammetry, rotating ring disk voltammetry and chronoamperometry as diagnostic techniques. The nafion membrane played a duel role as a matrix for the TBO immobilization and also helped to partitioning the NO from the solution phase. The diffusion coefficients of nitric oxide and oxygen at the TBO/nafion/GC modified electrode were calculated using chronoamperometric technique and rotating ring disk voltammetry, respectively. The ‘D’ value for nitric oxide and oxygen obtained by the above methods were found as 1.2798 × 10−6 and 1.4 × 10−5 cm2 s−1, respectively. From the intercept value of the Koutecky–Levich plot, the catalytic reaction rate constant, k, was calculated for O2 reduction and found as 6.6 × 104 M−1 S−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 588, Issue 2, 15 March 2006, Pages 235–243
نویسندگان
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