Electrochemical oxidation of iodate to periodate

被引：31

作者：

Janssen, LJJ ^{[1
]}

Blijlevens, MHA ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Lab Proc Dev, Dept Chem Engn, Workgrp Electrochem Technol, NL-5600 MB Eindhoven, Netherlands

来源：

ELECTROCHIMICA ACTA | 2003年 / 48卷 / 25-26期

关键词：

diamond electrode; lead electrode; lithium iodate; iodic acid; periodate;

D O I：

10.1016/S0013-4686(03)00535-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical oxidation of iodic acid and lithium iodate to periodate, a powerful oxidation agent for dialdehyde carbohydrates, was investigated for various anode materials (viz. boron-doped diamond, lead and platinum). Galvanostatic electrolyses and voltammetric experiments were carried out for iodic acid, iodic acid-lithium iodate and lithium iodate-lithium hydroxide solutions. It was found that the maximum periodate current efficiency for boron-doped diamond and lead electrodes is about 0.6 and for platinum electrodes almost zero. A reaction mechanism for the oxygen and periodate formation on the boron-doped diamond electrode in acid solution has been proposed. For a boron-doped diamond electrode in the high potential range the charge transfer coefficient and the exchange current density for the oxygen evolution are 0.14 x 10(-4) and 4 x 10(-4) A m(-2), respectively. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：3959 / 3964

页数：6