摘要
Ｆｅ（Ⅱ）和Ｓｂ（Ⅲ）的氧化还原峰电流在聚苯胺（ＰＡｎ）和聚吡啶（ＰＰｙ）膜电极上比在铂丝电极上高出一倍至数倍。在膜电极上氧化峰电位与还原峰电位之差值（△Ｅｐ）也比在铂丝电极上显著减小．说明两种膜电极对Ｆｅ（Ⅱ）和Ｓｂ（Ⅲ）离子的电极反应有较好的电催化活性。在电位扫描速度较低时，两种离子在聚合物膜电极上的氧化和还原反应的催化活性相近。
The electrocatalytic action of polyaniline(PAn)and polypyrrole(PPy) film elec-trode on Fe(Ⅱ)and Sb(Ⅲ)has been studied by cyclic voltammetry. The redox currents ofFe(Ⅱ) and Sb(Ⅲ)at the polymer film electrodes are twice or several times greater thanthose at bare Pt electrode. The difference between the redox peak potentials at the polymerfilm electrode becomes obviously less than that at the bare Pt electrode. The results showthat the PAn and PPy film electrodes exhibit catalytic activity for electrode reactiOn of Fe(Ⅱ) and Sb(Ⅲ).Anodic and cathodic currents of Fe(Ⅱ) andSb(Ⅲ)at two polvmer elec-trodes appeared identical at low potential sweep rate, The peak current linearly depends onthe square root of potential sweep rate, indicating that the electrode process at polymer filmis a diffusion controlled one.
出处
《应用化学》
CAS
CSCD
北大核心
1994年第1期42-45,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助课题
关键词
聚苯胺
聚吡咯
电催化
电极
铁
锑
polyaniline, polypyrrole,electrocatalvsis,cvclic voltammetry
