摘要
本文应用循环伏安法,电流阶跃法等电化学方法研究了p-苯二酚在铂电极上的氧化过程.在0.5mol.L^(-1)H_2SO_4+0.5mol.L~^(-1)Na_2SO_4溶液中,p-苯二酚的循环伏安图上有两个氧化峰,第一峰的位置在0.58V(Vs.SCE),第二峰的位置1.05V(Vs.SCE),说明p-苯二酚在铂电极上的氧化是分步进行的.用电流阶跃等方法,求得每步的电子转移数为1.提高电解溶液的pH值,氧化峰位置负移,说明电子转移后,有一去质子反应,p-苯二酚的整个电极反应为ECEC过程.
This paper deals with the oxidation of hydroquinone on platinum electrodes with various electrochemical methods, such as cyclic voltammetry and constant-current step method.There are two oxidation peaks on the cyclic voltammogram of hydroquinone in solution containing 0.5mol·L^(-1)H_2SO_4 and 0.5mol·L^(-1)Na_2SO_4; The first peak is located on 0.58v(Vs.SCE) and the second on 1.05v (Vs.SCE).signifying that the oxidation of hydroquinone on platinum electrode is carried out stepwise.The electron transfer number obtained in each step is one.After the electron transfer,there is a fast-speed deprotonation.The entire electrode reaction of hydroquinone is proposed as an ECEC process.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
1990年第2期79-83,共5页
Journal of East China Normal University(Natural Science)
关键词
苯二酚
铂电极
氧化反应
伏安法
Hydroquinone Anodic Oxidation Reaction Cyclic Voltammetry method Constant-Current step method
