摘要
研究了聚苯胺 ( PAn)膜电极在 2 ,5-二巯基 -1 ,3 ,4 -噻二唑 ( DMc T)溶液中电化学处理或浸泡后的循环伏安 ( CV)曲线的变化规律 .实验结果表明 ,PAn膜电极在 DMc T溶液中进行电化学处理或浸泡过程可使DMc T进入 PAn膜内部与 PAn形成复合物 .PAn对 DMc T的电化学催化作用可能和二者之间形成的电子给体 -受体复合物有关 .该复合物的电化学氧化还原特性不同于 PAn和 DMc T,其氧化还原反应速率和可逆性均优于 DMc
Electrochemical polymerized polyaniline(PAn) film electrode was used to investigate the electrocatalytic effect of PAn on the electrochemical redox reaction of 2,5dimercapto1,3,4thiadiazole(DMcT). PAn film electrode was electrochemically treated or immersed in DMcT solution before it was scanned in 1.0 mol/L HCl electrolyte. The cyclic voltammograms of PAn film electrode in 1.0 mol/L HCl solution changed with the above treatment, implying the electrocatalytic effect of PAn on the redox reaction of DMcT. The formation of electrondonoracceptor adducts through the interaction between thiol or disulfide groups of DMcT and amine or imine groups of PAn during the treatment was probably the reason of the catalysis. The electrochemical properties of the adduct were different from those of PAn and DMcT. The adduct possessed a higher electrochemical activity and a better electrochemical reversibility than DMcT or PAn used alone.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第2期311-314,共4页
Chemical Journal of Chinese Universities
关键词
聚苯胺
电化学催化
PA
膜电极
电极过程
Polyaniline
2
5-Dimercapto-1
3
4-thiadiazole
Electrochemical catalysis