Cr(III) oxidation with lead dioxide-based anodes

被引：108

作者：

Devilliers, D

Thi, MTD

Mahé, E

Le Xuan, Q

机构：

[1] Univ Paris 06, CNRS UMR 7612, Lab L12C, F-75252 Paris 05, France

[2] CNST, Inst Technol Trop, Hanoi, Vietnam

来源：

ELECTROCHIMICA ACTA | 2003年 / 48卷 / 28期

关键词：

lead dioxide electrode; titanium-based electrode; chromate; electrodeposition;

D O I：

10.1016/j.electacta.2003.07.005

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A procedure for preparing PbO2-based electrodes with a titanium substrate is proposed. A platinum underlayer is first deposited on Ti by metal organic chemical vapor deposition (MOCVD), followed by the electrodeposition of the PbO2 layer. The prepared Ti/Pt/PbO2 anodes were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD) before being used for oxidation of Cr(111) in sulphuric acid. The current efficiency was determined for that electrodes and the results were compared with those obtained with Pb/PbO2 and Ebonex((R))/PbO2 electrodes with different PH conditions. The Ti/Pt/PbO2 were found to have a very good electrochemical behaviour (current efficiency: phi = 0.93 for PH 2), and may be used as dimensionally stable anodes for the oxidation of Cr(111). (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：4301 / 4309

页数：9

共 33 条

[1] KINETIC STUDY OF THE REDUCTION OF CHROMIUM(VI) AT ROTATING GOLD MICROELECTRODES [J].