Electrochemical Impedance of Ethanol Oxidation in Alkaline Media

作     者：DANAEE Iman JAFARIAN Majid GOBAL Fereydoon SHARAFI Mahboobeh MAHJANI Mohammad-ghasem 

作者机构：Abadan Faculty of Petroleum Engineering Petroleum University of Technology Abadan 63165-619 Iran Department of Chemistry K. N. Toosi University of Technology Tehran 15875-4416 Iran Department of Chemistry Sharif University of Technology Tehran 11365-9516 Iran 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2012年第28卷第1期

页      面：19-25页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

主　　题：Impedance Equivalent circuit Ethanol Electrocatalytic Nickel 

摘      要：Nickel modified NiOOH electrodes were used for the electrocatalytic oxidation of ethanol in alkaline so lutions. The electro-oxidation of ethanol in a 1 mol/L NaOH solution at different concentrations of ethanol was stu died by ac impedance spectroscopy. Electrooxidation of ethanol on Ni shows negative resistance on impedance plots. The impedance shows different patterns at different applied anodic potential. The influence of the electrode potential on impedance was studied and a quantitative explanation for the impedance of ethanol oxidation was given by means of a proposed mathematical model. At potentials higher than 0.52 V（vs. Ag/AgCl）, a pseudoinductive behavior was observed, but at those higher than 0.57 V, impedance patterns were reversed to the second and third quadrants. The conditions required for the reversing of impedance pattern were delineated with the impedance model.