UV VISIBLE REFLECTION ABSORPTION-SPECTROSCOPY IN THE PRESENCE OF CONVECTIVE FLOW

被引：15

作者：

ZHAO, M ^{[1
]}

SCHERSON, DA ^{[1
]}

机构：

[1] CASE WESTERN RESERVE UNIV,DEPT CHEM,CLEVELAND,OH 44106

来源：

ANALYTICAL CHEMISTRY | 1992年 / 64卷 / 23期

关键词：

D O I：

10.1021/ac00047a032

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A spectroelectrochemical technique is herein described in which the surface of a rotating disk electrode is used as a mirror to reflect a focused beam of light in the UV-vis range at a near normal incidence angle. This approach makes it possible to probe quantitatively the presence of absorbing species in the diffusion boundary layer under well-defined hydrodynamic conditions. Good agreement between theory and experiments was obtained using the oxidation of Fe(CN)64-as a model system. In particular, the absorbance difference at the diffusion limiting current was found to be proportional to the reactant concentration, c(R), for a fixed rotation rate, omega, and proportional to omega-1/2 for a fixed c(R).

引用

页码：3064 / 3067

页数：4

共 8 条

[1]

CAHAN BD, 1988, EXTENDED ABSTRACTS

[2] ROTATING-DISK ELECTRODE WITH AN OPTICAL TRANSPARENT RING FOR SPECTROPHOTOMETRICAL INVESTIGATION OF PRODUCTS OF ELECTROCHEMICAL REACTIONS [J].