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1 弓言 节电是电解工业的重要研究课题.自采用钛钉金属阳极后,阴极就成为节电研究的主攻方向.气体扩散阴极和非铁活性阴极的研究较常见,前者用氧还原反应替代析氢电极反应’‘’,后者是在基体表面电沉积低氢过电位的Ni合金”-”.本文给出的铁黑阴极是一种新型电极,为电解工业阴极研究开辟了新途径. 在mH—5～6的亚铁盐溶液中,采用电化学手段建立很薄的表面富氧碱区（厚度约20urn）,将原铁阴极表面加工成均匀细颗粒状的黑色表面,称铁黑阴极.该方法简便,材料低廉,可循环再生.本文用电镜图和电子能谱图确定铁黑阴极表面结构和组分.在氯酸盐电解条件下进行析氢极化曲线和90天寿命试验.2 实验 铁黑阴极与原铁阴极的面积相同,约0.scm’.原铁阴极采用氯酸盐电解工业使用的低碳钢材料（福州第一化工厂提供）. 铁黑阴极表面的电镜图（SEM）和X光电子能谱图（XPS）分别在日本S-520扫描电镜仪和英国＊既＊-＊K工电子能谱仪上测试.＊陀图上结合能数值已用C;s内标校正. 测量极化曲线电解液组成为NaCI 1609/din‘和Na。Cr。O,3g/din’,PH—6,温度65士ZC.辅助电极和参比电极分别为钛钉阳极和饱和甘汞电极.阴极电流密度范围为0.1～3.okA/m’. 寿命试验的初始电解液组成与测极化曲线时相同,电液量100cm‘.将原铁阴极?
The energy saving is one of the most important research topics in the electrolysis industry.After the titanium anode is used, the cathodes become the main direction of energy-saving research.The research of gas-diffusion cathode and non-iron active cathode is more common, the former is replaced by oxygen reduction reaction Hydrogen electrode reaction ’,’ the latter is the electrodeposition of low hydrogen overpotential Ni alloy “-” .The iron-black cathode presented in this article is a new type of electrode, open up new avenues for the electrolytic industry cathode research. mH-5 ~ 6 ferrous salt solution, the use of electrochemical means to establish a thin surface of the oxygen-rich alkaline region (thickness of about 20urn), the original iron cathode surface into a uniform fine grained black surface, said iron black cathode The method is simple, the material is cheap, and can be recycled.We used electron microscopy and electron spectroscopy to determine the structure and composition of iron-black cathode surface.Phosphoric acid polarization curve and 90-day life test were carried out under chlorate electrolysis.2 Experimental iron black cathode with the same area of the original iron cathode, about 0.scm ’. The original iron cathode using chlorate electrolysis of industrial low-carbon steel materials (Fuzhou No.1 Chemical Plant). SEM) and X-ray The energy spectrum (XPS) was measured on a S-520 SEM and a UK * * * K electron spectrometer, respectively. The curve electrolyte consists of NaCI 1609 / din ’and Na. Cr. O, 3g / din ’, PH-6, temperature 65 ± ZC. The auxiliary electrode and the reference electrode were titanium nail anode and saturated calomel electrode cathode current density range of 0.1 ~ 3.okA / m’ life test The initial electrolyte composition and measured polarization curve the same, the electro-hydraulic volume 100cm ’. The original iron cathode?