聚二茂铁硅烷膜在水溶液中的循环伏安研究

A Study of the Cyclic Voltammetry of Poly(ferrocenylsilanes)Films on a Glassy Carbon Electrode in Aqueous Solutions

采用循环伏安法研究了聚二茂铁二甲基硅烷膜(PFDMS)和聚二茂铁甲基苯基硅烷膜(PFMPS)在8种常规电解质水溶液中的电化学行为,在一些电解质水溶液中,循环伏安峰迅速衰减,而在一些电解质水溶液中可得到稳定、重复的循环伏安谱.测定了两种膜在LiClO4水溶液中循环伏安过程的表面传递系数(αnα)、表观扩散系数(Dapp)和表面电荷传递速率常数(k0),讨论了膜的电极过程机理.

The electrochemical behavior of polyferrocenyldimethylsilane(PFDMS)film and polyferrocenylmethylphenylsilane(PFMPS)film in eight kinds of electrolyte aqueous solutions has been studied with cyclic voltammetry.In some electrolyte solutions,the cyclic voltammetric peak current is attenuating gradually along with the increase of sweep times,whereas,in other electrolyte solutions stable and repeated cyclic voltammograms can be obtained.The kinetic parameters,such as the surface transfer coefficient(αnα),the apparent diffusion coefficient (Dapp)and standard rate constant of charge transport(k0)of two films in LiClO4 aqueous solutions have been measured.The mechanism of the films on electrode process has been discussed.