Simultaneous detection of hydroquinone and catechol on electrochemical-activated glassy carbon electrode by simple anodic and cathodic polarization

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• 作者：Hua Zhang ; Sue Li ; Fenghua Zhang ; Meixia Wang…
• 关键词：Catechol ; Hydroquinone ; Simultaneous detection ; Cyclic voltammetry ; Polarized glassy carbon electrode
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：21
• 期：3
• 页码：735-745
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1433-0768
• 卷排序：21

文摘

Herein, we report a simple method of simultaneous detection of hydroquinone (HQ) and catechol (CC) by cyclic voltammetry (CV) using activated glassy carbon electrodes (GCE). It was found that the two isomers can be completely separated by CV method on cathode polarized GCE (PGCE) after its anodic oxidation. This facile processing method solves the difficulty of electrode surface regenerating which disturb most modified electrodes for the complex composition ease of being contaminated by the analytes in measurement. Morphology and composition of the PGCE were characterized by scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectra, and X-ray photoelectron spectroscopy. In addition, the reaction kinetic of HQ and CC reaction on the PGCE was investigated. It was found that the reaction kinetics of HQ and CC is a surface adsorption-controlled process at low concentration and a diffusion-controlled process at high concentration.