Oxygen-evolving SnO2-based Ceramic Anodes in Aluminium Electrolysis

被引：8
|
作者：
Popescu, Ana-Maria [1 ]
机构：
[1] Romanian Acad, Ilie Murgulescu Inst Phys Chem, Bucharest 060021, Romania
来源：
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2014年 / 30卷 / 05期
关键词：
Inert anode; Aluminium electrolysis; Polarization; Voltammetry; INERT ANODES; BEHAVIOR; OXIDE; SNO2; CORROSION;
D O I：
10.1007/s40242-014-4137-4
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This study deals with SnO2-based ceramic anodes doped with Sb2O3 and CuO, aiming at contributing new data regarding their electrochemical behavior in cryolite melts. The performances of the anodes were evaluated by anodic polarization, cyclic voltammetry, and current efficiency and corrosion measurements. The investigation proves that the anodic process of SnO2-based inert anodes occurs at a low overvoltage and the oxygen discharge takes place in one step with an exchange of two electrons. The current efficiency and corrosion were proved to be dependent on the electrolysis parameters and composition of electrolysis bath. For a long term electrolysis, the dissolution of the anode in the cryolite-alumina melt produced small aluminium contamination(ca. 0.2%, mass fraction).
引用
收藏
页码：800 / 805
页数：6
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