Electrochemical deposition of iridium(IV) oxide from alkaline solutions of iridium(III) oxide

被引：125

作者：

Baur, JE ^{[1
]}

Spaine, TW ^{[1
]}

机构：

[1] Illinois State Univ, Dept Chem, Normal, IL 61790 USA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 443卷 / 02期

关键词：

electrodeposition; iridium oxide; hydrous oxide; glassy carbon electrode; pH electrode;

D O I：

10.1016/S0022-0728(97)00532-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Cyclic voltammetry is used to deposit films of hydrous iridium oxide onto glassy carbon electrodes from a basic solution of saturated iridium(III) oxide. An acidic solution of Ir(OH2)(2)Cl-4(-) is first prepared from either IrCl63- or IrCl62-. When this solution is made basic, iridium(IV) oxide is deposited by oxygen generated from oxidation of hydroxide. A strongly adherent, bright blue deposit of iridium oxide is formed after 10 to 20 scans between -0.3 and + 1.0 V vs. Ag/AgCl. The modified electrodes exhibit a super-Nernstian response to pH similar to that observed for iridium oxide grown electrochemically on iridium substrates. The pH response is reproducible and remains stable over a period of several days. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：208 / 216

页数：9

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