کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1250820 1496030 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical behaviour of antioxidants: Part 2. Electrochemical oxidation mechanism of quercetin at glassy carbon electrode modified with multi-wall carbon nanotubes
ترجمه فارسی عنوان
رفتار الکتروشیمیایی آنتی اکسیدان ها: قسمت 2. مکانیسم اکسیداسیون الکتروشیمیایی کورستین در الکترود کربن شیشه ای اصلاح شده با نانولوله های کربنی چند دیسک
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی

Electrochemical oxidation mechanism of quercetin was investigated at glassy carbon electrode modified with multi-wall carbon nanotubes in aqueous 0.2 M phosphate solutions with different pHs. The investigation was carried out using cyclic voltammetry, double potential step chronoamperometric and chronocoulometric techniques. It was found that the oxidation mechanism proceeds in sequential steps, related with the five-hydroxyl groups in the three aromatic rings. The mechanism was proposed to be an ECEC, first-order kinetics. The proposed mechanism was confirmed on comparing the digital simulated cyclic voltammetric responses with the experimental ones. The electrode homogeneous and heterogeneous kinetic parameters of electrode reaction are estimated from the simulated data. Moreover, quercetin molecules adsorb on the electrode surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arabian Journal of Chemistry - Volume 9, Issue 3, May 2016, Pages 350–356
نویسندگان
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