Electrochemical generation of ferrate on SnO2-Sb2O3/Ti electrodes in strong concentration basic condition

被引：28

作者：

Zhang, CZ ^{[1
]}

Liu, Z ^{[1
]}

Wu, F ^{[1
]}

Lin, LJ ^{[1
]}

Qi, F ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem Engn & Environm, Beijing 100081, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2004年 / 6卷 / 11期

关键词：

ferrate; electrochemical generation; dimensionally stable anode; cyclic voltammetry; secondary battery; amphoteric hydroxide;

D O I：

10.1016/j.elecom.2004.08.011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The excellent over-potential with respect to the OER in strong basic solution of the SnO2-Sb2O3/Ti anode was applied to the investigation of the electrochemical behaviour of the redox couple FeO42-/FeO2-. The results proved that ferrate could be generated by the electrochemical path without any side reaction of OER on the electrode of SnO2-Sb2O3/Ti. At the same time, the formation of Fe(III) species, which formed a redox couple with FeO42- in strong basic solution, was confirmed as exclusively FeO2-. The generation of FeO2- and the ionization of Fe(III) hydroxide in very high concentration basic environment were explored and discussed. The results proved that acidity and acidic ionization of Fe(III) hydroxide play an un-neglected role for the safe rechargeable super-iron battery. Furthermore the mechanism of electrochemical generation of ferrate was investigated and exhibited as the mechanism of CEC. The relative barriers for the manufacture of secondary super-iron battery were discussed. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1104 / 1109

页数：6

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