文献类型：期刊文献

中文题名：草酸电解过程中阴极失活影响因素研究

英文题名：Influencing factors of cathode deactivation during electro-reduction of oxalic acid

作者：金玲[1];钮东方[1];张新胜[1];袁渭康[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2014

卷号：34

期号：6

起止页码：58

中文期刊名：现代化工

外文期刊名：Modern Chemical Industry

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：草酸;电解还原;乙醛酸;阴极失活;电流效率

外文关键词：oxalic acid ; electro-reduction; glyoxylic acid; cathode deactivation; current efficiency

摘要：考察了草酸电解还原制乙醛酸过程中铅阴极失活的因素。实验表明,电解产物乙醛酸在电极表面的吸附量ΓR随着反应的进行不断增大,电流效率也随之大幅下降。尽管电解过后的铅电极表面可能形成草酸铅及氧化铅颗粒,导致反应物与电极表面接触区域减小,从而使得反应速率下降,但仍没有电解液组成变化对电流效率的影响大。而低析氢过电位金属在浓度较低时,电极表面的沉积对电流效率降低的影响并不显著。
The influencing factors of cathode deactivation during electro-reduction of oxalic acid have been studied.The results show that the adsorption of glyoxylic acid on the electrode increases with the time of electro-reduction,causing the great decrease of current efficiency.Although EDS results show that possible lead oxide coating on the electrode surface gives rise to some current efficiency decline,such influence is less than the adsorption of glyoxylic acid.In addition,copper ion with low hydrogen evolution potential has less effect on the current efficiency at low concentration level.