ELECTROCHEMICAL CATALYSIS AT AN ULTRAMICROELECTRODE MODIFIED WITH REDOX SPECIES

被引：4

作者：

CHE, GL ^{[1
]}

DONG, SJ ^{[1
]}

机构：

[1] CHINESE ACAD SCI,CHANGCHUN INST APPL CHEM,ELECTROANALYT CHEM LAB,CHANGCHUN 130022,PEOPLES R CHINA

来源：

ELECTROCHIMICA ACTA | 1993年 / 38卷 / 04期

关键词：

ULTRAMICROELECTRODE; MICROVOLTAMETRIC THEORY; MODIFIED ULTRAMICROELECTRODE; ELECTROCATALYSIS; ELECTRODE KINETICS;

D O I：

10.1016/0013-4686(93)85016-R

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

General equations of the electrocatalytic reaction at an ultramicroelectrode modified with redox species have been described according to the Andrieux Saveant model. The electrocatalytic kinetic process has been discussed for the whole set of cases, ie (R), (R + S), (SR) (SR + E), (E), (R + E), (ER), (S), (ER + S) and (S + E) limiting situations. The effect of gamma on the catalytic steady state current shows that the higher the value of gamma, the lower the catalytic current. The kinetic process shifts rapidly from R to E with increasing values of gamma. It is favorable for catalysis only when gamma is very low. Therefore, the redox species modified ultramicroelectrode with thin film is utilized for electrocatalysis, and the larger the radius of ultramicroelectrode, the higher the catalytic efficiency.

引用

页码：581 / 588

页数：8