摘要
通过热分解法制备不同钌含量的钛基锡锰氧化物阳极。X射线衍射谱图显示所制备的电极的主要相态为金红石型β-MnO2;循环伏安曲线与稳态极化曲线测试表明随着钌含量的增加,电极上的氧化电流也快速上升,析氯的选择性提高;适量掺混钌可以增加涂层表面析氯反应活性点的数目,当钌的质量分数为2%时,反应活性点的数目达到最大;电化学阻抗谱研究表明掺杂钌明显减小电极氧化物涂层的膜电阻Rf和析氯反应的电荷传递电阻Rct,有效地提高电极的电催化效果。钛基锡锰钌涂层电极可用于制备次氯酸钠,NaC lO的生成速率为34.8mg/(L.m in)。
The titanium -based tin and manganese oxide anodes with diffrent content of ruthenium are made by thermal decomposition. The major phase state of the anodes made is rutile - type β - MnO2 by X - ray diffraction spectrogram. It is showed by the testing of cyclic voltampere curve and stationary polarization curve that oxidation current on the anodes goes up immediately and selectivity of chlorine evolution increases with the increase of ruthenium content. It is showed by the vohampere electric quantity obtained that the number of active points of chlorine evolution on the coating surface can be increased by blending Ru appropriately ,and the number has reached the greatest when the mixing mass fraction of ruthenium is 2%. It is showed by electrochemical impedance spectrometry that both membrane resistance of anode oxide coating and the charge transfer resistance of chlorine evolution are obviously decreased to effectively praise the electrocatalytic effect by the mixed ruthenium. The tin, manganese , and ruthenium oxide -coated anodes based on titanium can be used to produce sodium hypochlorite, and the formation rate is 34.8 mg/（ L · min）.
出处
《氯碱工业》
CAS
2009年第1期11-15,共5页
Chlor-Alkali Industry
关键词
钛基锡锰钌氧化物阳极
电化学性能
热分解法
titanium - based tin, manganese, and ruthenium oxide anodes
electrochemical behavior
heat decomposition
