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
收藏
页码：1104 / 1109
页数：6
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