草酸电还原反应机理的研究  

Studies on the Mechanism of Electroreduction of Oxalic Acid

作　　者：刘欣[1] 李宇展[1] 胡瑞省[1] 顾登平[1] 

机构地区：[1]河北师范大学化学学院,河北石家庄050016

出　　处：《电化学》2004年第1期41-45,共5页Journal of Electrochemistry

摘　　要：　以硫酸钠溶液作底液,用快速循环伏安和电势阶跃法研究了草酸在铅电极上的电还原机理,测定了草酸电还原第一步反应的动力学参数,并根据循环伏安图比较相同条件下草酸,乙醛酸和乙醇酸的还原峰峰电势,推断出草酸还原的中间产物.研究结果表明,草酸电还原遵从不可逆2电子EE反应机理.The electroreduction mechanism of oxalic acid on Pb electrode in Na_2SO_4 solution were investigated using high scan rate cyclic voltammetry and chronoamperometry. The dynamic parameters for the first step electron transter reaction of oxalic acid electroreduction by were determined. The corresponding reduction peak potentials of oxalic acid, glyoxylic acid and glycolic acid in the cyclic voltammogranis obtained in the same condition were compared, and the intermediate reduction products of oxalic acid were suggested. The results showed that oxalic acid is weakly absorbed on the lead electrode.

关 键 词：草酸 电还原反应 反应机理 快速循环伏安法 电势阶跃法 不可逆2电子EE反应 动力学参数 乙醛酸 乙醇酸 中间产物 

分 类 号：TQ151.4[化学工程—电化学工业]