甲醛阳极氧化的电位振荡特征

Characteristics of the Potential Oscillations in the Anodic Oxidation of Formaldehyde

甲醛阳极氧化过程中出现的电流或电位振荡现象在文献中已有报道。然而,由于所述振荡现象相当复杂,迄今未能从机理上加以圆满的解析。Wojtowicz已对某些有关的机理假设提出质疑。本工作从分析甲醛恒电流电位振荡主序列的特征入手,追寻振荡现象同电极过程机理的联系。1

Some characteristics of the potential oscillations in the anodic oxidation of formaldehyde in sulfuric acid medium were studied at a rotating disk platinum electrode under conditions of constant temperature and rotation rate. From the oscillatory parameters (potential,frequency, charge of a single cycle, etc. ) at different anodic polarization currents,the sustained and non-sustained oscillatory states were distinguished, and the relationship between different oscillatory states and the mechanism of the electrochemical oxidaton of formaldehyde was discussed.