制备了“锰中毒”的氧化物阳极试样,利用循环伏安测试等电化学方法和扫描电镜等物理表征手段研究了阳极中毒的原因,并研究了恒电流反向电解法清除阳极表面沉积锰的可行性.结果表明,阳极发生“锰中毒”现象,是因为阳极电位达到1.1V时,Mn2会被氧化成MnO2并在阳极表面形成沉积层.反向电解法可以有效活化锰中毒阳极,恒电流法反向电解的最佳电流密度为0.10 mA/cm2.
Mn2+ poisoned Ti/IrO2-Ta2O5-SnO2 anodes were prepared and the cause of poison was studied by means of current efficiency test,cyclic voltammetry (CV) and SEM.Reactivation of poisoned anodes was also studied.The results showed that the anodes would be Mn2 + poisoned when the potentials of anodes reached 1.1 V (v.s.SCE) and Mn2 + was oxidized into MnO2 which would deposit on the surface of the anodes.Galvanostatic reverse electrolysis could reactivate the anodes efficiently,and its best current density was 0.10 mA/cm2.
参考文献
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%