SYNTHESIS AND CHARACTERIZATION OF RU-TI4O7 MICROELECTRODE ARRAYS

被引：13

作者：

HE, L ^{[1
]}

FRANZEN, HF ^{[1
]}

VITT, JE ^{[1
]}

JOHNSON, DC ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 04期

关键词：

D O I：

10.1149/1.2054833

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A synthesis is described for Ru microelectrode arrays within a conductive Ti4O7 ceramic matrix. Data obtained by x-ray diffractometry and scanning electron microscopy are consistent with the existence of heterogeneous mixtures of Ru particles (ca. 0.8 mum diam) within the Ti4O7 matrices. No mixed metal oxides or other new compounds are detected. Rotated disk electrodes (RDEs) constructed from the Ru-Ti4O7 materials are compared on the basis of their voltammetric response for the oxidations of I- to I2 and IO3- in 0.10M H2SO4. These results are rationalized on the basis of microelectrode arrays, i.e., elevated current densities and diminished sensitivity to changes in rotational velocity compared with solid Ru RDE. An RDE constructed from Ru-Ti4O7 containing ca. 0.5% Ru by volume exhibits virtually zero dependence on rotational velocity for the oxidation of I- to I2 and, therefore, this material functions as an ideal microelectrode array

引用

页码：1014 / 1020

页数：7

共 24 条

[1] DIFFUSION-CONTROLLED CURRENT AT THE STATIONARY FINITE DISK ELECTRODE - THEORY [J].