5-硝基-1,4-萘醌在玻碳电极上的电化学行为研究  

Electrochemical behavior of 5-nitro-1,4-naphthoquinone on GC electrode

作　　者：李聪[1] 陈雯[1] 张明晓[1] 

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《化学研究与应用》2011年第11期1500-1503,共4页Chemical Research and Application

摘　　要：采用循环伏安法和线性扫描伏安法,研究了5-硝基-1,4-萘醌在玻碳电极上的电化学行为。结果表明,在丙酮的稀硫酸溶液中,5-硝基-1,4-萘醌在0.0V、-0.8V(vs.SCE)处各有一个还原峰,分别为硝基、醌的不可逆电极反应;5-硝基-1,4-萘醌在电极表面的传质为线性扩散,电还原过程由扩散控制,并求得传递系数分别为α1=0.48,α2=0.34;电化学还原过程受扫描速度、温度、底物浓度、稀硫酸含量等因素的影响,还原峰电流与扫描速度、温度、底物浓度呈线性关系,电解液中稀硫酸浓度为cH2SO4=0.14 mol.L-1时,还原峰电流最大。The electrochemical behavior of 5-nitro-1,4-naphthoquinone at GC electrode was investigated by means of cyclic voltammetry and linear sweep voltammetry.The results showed that two cathodic current peaks were absorbed during the reduction processs in acetone and sulphuric acid,and they were respectively the reduction of nitro at 0.0V and the reduction of quinonyl at-0.8V （vs.SCE） The electrode reaction was diffusion-controlled and the transfer coefficients were 0.48 and 0.34.The electrochemical reduction was effected by scan rates,temperatures,concentration and the content of sulphuric acid.The reductive peak current increases linearly with scan rates,temperatures and concentration,and the reductive peak current was largest while the content of dilute sulphuric acid was 0.14 mol.L-1.

关 键 词：5-硝基-1 4-萘醌 玻碳电极 电还原 

分 类 号：O657.1[理学—分析化学]