测量氯酸盐生产中由阴极副反应引起的电流效率损失的新方法

CIESC Journal

测量氯酸盐生产中由阴极副反应引起的电流效率损失的新方法

衣宝廉

中国科学院大连化学物理研究所

出版日期:1986-12-25 发布日期:1986-12-25

A New Method for Measuring the Loss of CurrentEfficiency Owing to Cathodic Secondary Reactionsin the Production of Chlorate

Yi Baolian (Dalian Institute of Chemical Physics, Academic Sinica)

Online:1986-12-25 Published:1986-12-25

摘要/Abstract

摘要： 组装了由镍网阴极与多孔气体扩散型氧阴极所构成的双阴极电解槽,两阴极间置有多孔阻气透液隔膜如石棉膜.利用这种电解槽研究了氯酸盐电化生产过程中阴极电流效率的损失.当镍网阴极电位高于析氢电位时,于氧阴极进行氧的电化还原反应,而于镍网阴极上进行HCIO或CIO-的电化还原.因以,镍网阴极电流表征了由阴极副反应所引起的电流效率损失.使用这种方法还研究了在氯酸盐电化生产过程中阴极副反应电流与NaClO_3浓度,电解液的pH值及有无添加Na_2Cr_2O_7的关系.这种方法同样也适用于研究氯碱过程,BrO_3~-,IO_3~-与C1O_4~-等电化生产过程中由阴极副反应所引起的电流效率损失.

Abstract: An electrolytic cell with a dual cathode consisting of a Ni screen cathode and a poroun gas-diffusion oxygen cathode separated from each other by a porous diaphragm, has been constructed for measuring the loss of current efficiency. The reduction of oxygen and the reduction of HClO or C1O- could take place only on the oxygen cathode and Ni cathode, respectively. While the Ni cathode potential is higher than that for the evolution of H2, the Ni cathode current is responsible for the cathodic secondary reactions. The dependence of cathodic secondary current on the concentration of NaClO3, pH of the solution and the presence of Na2Cr2O7 has also been investigated. This method is also applicable to investigating the loss of cathode current efficiency for the production of chloro-alkali, BrO3-, IO3- and C1O4-.

衣宝廉. 测量氯酸盐生产中由阴极副反应引起的电流效率损失的新方法 [J]. CIESC Journal.

Yi Baolian (Dalian Institute of Chemical Physics, Academic Sinica). A New Method for Measuring the Loss of CurrentEfficiency Owing to Cathodic Secondary Reactionsin the Production of Chlorate[J]. .