APPLICATION OF POTENTIAL-MODULATED UV-VISIBLE REFLECTANCE SPECTROSCOPY TO ELECTRON-TRANSFER RATE MEASUREMENTS FOR ADSORBED SPECIES ON ELECTRODE SURFACES

被引：81

作者：

FENG, ZQ ^{[1
]}

SAGARA, T ^{[1
]}

NIKI, K ^{[1
]}

机构：

[1] YOKOHAMA NATL UNIV,DEPT CHEM PHYS,ELECTROCHEM LAB,HODOGAYA KU,YOKOHAMA,KANAGAWA 240,JAPAN

来源：

ANALYTICAL CHEMISTRY | 1995年 / 67卷 / 19期

关键词：

D O I：

10.1021/ac00115a028

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrode reaction rate constant of an electrochemically active species adsorbed on an electrode surface was determined by potential-modulated UV-visible reflectance spectroscopy. In-phase and 90 degrees out-of-phase components of the electroreflectance signal at an electrode/adsorbed layer interface in response to a sinusoidal modulation of the electrode potential were formalized as a function of the modulation frequency. The heterogeneous rate constant k(s) (the overall rate constant) of the electrode reaction of a dye adsorbed on a glassy carbon electrode surface was determined by analyzing the frequency dependence of the electroreflectance signal, The electrode reaction rate constant k(s) were 4.9 x 10(3) s(-1) for hemin and 5.4 x 10(2) s(-1) for Nile Blue A.

引用

页码：3564 / 3570

页数：7

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