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用玻碳电极研究了与Fe(Ⅵ)／Fe(Ⅲ)电对氧化还原有关的循环伏安曲线.所研究的体系是13mol·L-1NaOH中浓度范围分别为0.015～0.06mol·L-1的Na2FeO4和0.01～0.025mol·L-1的NaFeO2溶液。另一类研究体系是胶体石墨分别与固体K2FeO4、固体KFeO2组成的混合物,将这些混合物粘附于玻碳电极表面后在13mol·L-1KOH中进行循环伏安曲线的测定。结果证明了峰电位在0.7～1.0V的阳极电流峰与峰电位在0.15～0.2V(均相对于13mol·L-1NaOH或13mol·L-1KOH溶液中的Hg／HgO参比电极)的阴极电流峰,分别与高铁酸盐的生成与还原相对应。确定了将高铁酸盐的阳极生成电流峰与阳极析氧电流峰区别开来的条件。
The cyclic voltammograms related to the redox reaction of Fe (Ⅵ) / Fe (Ⅲ) were studied by using glassy carbon electrode. The concentration of 13 mol·L-1 NaOH in the system was 0.015 ~ 0.06 mol·L-1 Of Na 2 FeO 4 and 0.01 ~ 0.025 mol·L -1 of NaFeO 2 solution. Another type of research system is the mixture of colloidal graphite with solid K2FeO4 and solid KFeO2, respectively. The cyclic voltammetry curves of these compounds were measured in 13mol·L-1 KOH after adhering to the surface of glassy carbon electrode. The results demonstrate that the anode current peak at a peak potential of 0.7 to 1.0 V and the cathode current at a peak potential of 0.15 to 0.2 V (both relative to the Hg / HgO reference electrode in a 13 mol·L-1 NaOH or 13 mol·L-1 KOH solution) Peak, respectively, corresponding to the formation and reduction of ferrate. The conditions for distinguishing the anodic formation current of ferrate from the anodic deposition current were determined.