基于聚丙烯腈碳毡电极的偏硼酸钠电解行为研究  

Study on Electrolytic Behavior of Sodium Metaborate Based on Polyacrylonitrile Felt Electrode

作　　者：戴玺[1] 郭瓦力[1] 张弢[1] 李磊[1] 王晓冰[1] 朱虹[1] 邓信忠[1] 

机构地区：[1]沈阳化工大学,辽宁沈阳110142

出　　处：《当代化工》2013年第8期1072-1075,1096,共5页Contemporary Chemical Industry

摘　　要：通过循环伏安法研究了聚丙烯腈碳毡电极用于电解法硼氢化钠制备的可行性,以硼氢化钠实际生成量为指标,研究了在恒流,脉冲条件下碳毡电极对电解反应生成量的影响,针对碳毡电极本身的物理特性考察了碳毡的新旧程度对电解反应的影响,考察了电极孔隙电解液和电解槽中电解液中硼氢化钠生成量的差别。研究结果表明:碳毡电极独特的物理结构改善了阴极对BO2-排斥,对BO2-在阴极上发生还原生成硼氢化钠有很好的促进作用;电极排斥力与碳毡吸附力共同作用于阴极上的BO2-还原,因此一定电流强度下硼氢化钠生成量存在极大值;相比于电解槽内电解液,碳毡孔隙内硼氢化钠含量明显增多,最多可达到槽内电解液中硼氢化钠含量的22.7倍。The feasibility of using polyacrylonitrile carbon felt electrode for sodium borohydride preparation from sodium metaborate electrolysis was studied by means of cyclic voltammetry.Effects of the felt electrode on electrolysis reaction were investigated under constant current or pulsed conditions,in which the actual production of sodium borohydride was taken as an experiment indicator.Considering the physical properties of carbon felt electrode,the effects of electrolysis reaction according to the age of polyacrylonitrile felt electrode and the sodium borohydride concentration difference between the electrolytes both in electrode pore and in electrolytic cell were also discussed.The results show that the unique physical structure of carbon felt electrode can be used to solve the problem of BO2-exclusion on cathode well,which plays an important role in promoting BO2-cathode restore to generate sodium borohydride.Because of the electrode repulsion and carbon fiber felt adsorption force acting on the BO2-reduction on the cathode,there is a maximum value of sodium borohydride production to some extent of current intensity.Compared with the electrolyte in electrolytic cell,the content of sodium borohydride in the pores of the carbon felt can be 22.7 times as much as the content in the electrolyzer.

关 键 词：能源 硼氢化钠 碳毡 电解法 电极 

分 类 号：TQ151[化学工程—电化学工业]