首页 | 本学科首页   官方微博 | 高级检索  
     

聚苯胺对DMcT氧化还原反应的电催化作用
引用本文:李红,马文石. 聚苯胺对DMcT氧化还原反应的电催化作用[J]. 电源技术, 2002, 26(1): 32-35
作者姓名:李红  马文石
作者单位:1. 华南师范大学化学系,广东,广州,510631
2. 华南,理工大学材料科学与工程学院,广东,广州,510640
基金项目:国家自然科学基金 (5970 30 0 8),广东省自然科学基金(970 4 90 )
摘    要:采用循环伏安法和交流阻抗法研究了聚苯胺 (PAn)对 2 ,5 二巯基 1,3 ,4 噻二唑 (DMcT)氧化还原反应的电催化作用及其DMcT/PAn复合物的电化学性能。结果表明 ,PAn膜电极在含饱和DMcT电解质溶液中不仅可以形成DMcT/PAn复合物 ,而且复合物电极呈现的氧化还原的峰电位差较电极未修饰前明显减少。DMcT/PAn复合物电极和PAn电极在 1.0mol/LHCl溶液中呈现相似的复数平面图 ,但在开路电位下在高频段的半圆的直径前者大于后者 ,而在 1.0V电位下则前者小于后者。因此认为在DMcT/PAn复合物中 ,DMcT是主要的电活性物质 ,PAn则可以较大程度地提高复合物的导电性和电荷传递速度 ,对DMcT的氧化还原反应有显著的催化作用。

关 键 词:聚苯胺  2  5-二巯基1  3  4-噻二唑  电催化作用  循环伏安法  电化学阻抗谱
文章编号:1002-087(2002)01-0032-04
修稿时间:2001-03-18

Electrocatalytic effects of polyaniline on the redox reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT)
LI Hong ,MA Wen shi. Electrocatalytic effects of polyaniline on the redox reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT)[J]. Chinese Journal of Power Sources, 2002, 26(1): 32-35
Authors:LI Hong   MA Wen shi
Affiliation:LI Hong 1,MA Wen shi 2
Abstract:The electrocatalytic effects of polyaniline (PAn) on the redox reaction of 2,5 dimercapto 1,3,4 thiadiazole (DMcT) were investigated using electrochemical techniques, including cyclic voltammetry and AC impedance spectroscopy. The results show that on polyaniline electrode, the DMcT/PAn adduct can be formed in the solution containing both supporting electrolyte and saturated DMcT, and the isolation of the anodic and cathodic peak potential is obviously smaller than that on bare electrode. The electrochemical spectrum for DMcT /PAn adduct is a semi circle in the high frequency range, which is similar to that of polyaniline. How ever, the diameters of semi circles for DMcT/PAn adduct become larger than that of polyaniline at open circuit potential, whereas the former is smaller than the latter at 1.0 V. DMcT is the major active substance, and PAn can obviously enhance the conductance and charge transfer rate of DMcT/PAn adduct. The electrocatalytic activity of the adduct is higher than that of DMcT or PAn used alone.
Keywords:polyaniline  2  5 dimercapto 1  3  4 thiadiazole (DMcT)  electrocatalysis  cyclic voltammetry  electrochemical impedance spectra
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号