电化学2017，Vol.23Issue(6)：645-653,9.DOI:10.13208/j.electrochem.161017
铁电极电还原溴化钠甲醇溶液反应动力学和机理
Kinetics and Mechanism toward Electrochemical Reductions of Sodium Bromide and Methanol over Iron Electrodes
摘要
Abstract
It is of technological value and scientific interest to the electro-synthesis of ferrocene,conversion of carbon dioxide (CO2) and organic electro-synthesis in non-aqueous solutions by investigating the kinetics and mechanism toward electrochemical reductions of sodium bromide (NaBr) and methanol over iron electrodes.However,few reports in the related researches are available.In this article,the kinetics and mechanism toward electrochemical reductions of NaBr and methanol over iron electrodes were examined in detail by carrying out the polarization curve and electrochemical impedance spectroscopic measurements.The results showed that methanol was the reactant,while Na+ ions were functioned only as conducting species;the electrode potential was the only status variable,and its impact on the rate constants of the electro-reduction of methanol followed classic Arrhenius' s equation;the reduction was not limited by concentration diffusion,but mainly by the Ohmic polarization;the amount of H2 gas production obeyed the Faraday's law and the activation energy was evaluated to be ～ 26.2 kJ· mol-1.关键词
甲醇/电还原/溴化钠/电化学阻抗谱/铁电极Key words
methanol/electro-reduction/sodium bromide/electrochemical impedance spectroscopy/iron electrode分类
化学化工引用本文复制引用
廖群,张曙枫,冷文华..铁电极电还原溴化钠甲醇溶液反应动力学和机理[J].电化学,2017,23(6):645-653,9.
