摘要
测定了二茂铁衍生物——硬脂酸二茂铁酯L-B膜修饰SnO_2电极在Fe(CN)_6^(3-/4-)溶液中的阻抗性能,用单纯形法求出了等效电路中的元件参数值,计算了电极反应速度常数K_s。从分析SnO_2电极修饰不同层的硬脂酸二茂铁酯L-B膜的界面阻抗和电极反应的动力学性能,表明与在固相中研究的硬脂酸二茂铁酯L-B膜的阻抗性能明显不同,在Fe(CN)_6^(3-/4-)溶液中表现了电活性分子修饰电极的界面阻抗行为,进一步证实了修饰在SnO_2电极上的硬脂酸二茂铁酯L-B膜在Fe(CN)_6^(3-/4-)的氧化还原电极反应过程中,起电荷传递的中介作用。
The impedance of SnO2 electrode modified by ferrocene derivative——ferrocenyl-n-octadecanoale L-B films was measured. The estimation of element parameter values occurring in equivalent circuit was performed by using simplex method. Reaction rate constant Ks was also determined. Analysis of interface impedance and electrode reaction kenitic performances indicated that modified ferrocenyl-n-octadec-anoale L-B films show impedance behaviours of electroactive molecules differing obviously with that obtained in solid state. The fact that ferrocenyl-n-octadecanoale L-B films act as charge transfer mediator in SnO2/Fe(CN)63-/4-redox reaction was proved.
出处
《感光科学与光化学》
CSCD
1992年第1期6-11,共6页
Photographic Science and Photochemistry
基金
国家自然科学基金
关键词
电极
阻抗
膜
氧化物
硬脂酸
modified electrode, interface impedance, equivalent circuit, charge transfer, L-B films
