Square wave voltammetry analysis of NaCl-KCl-Na₂WO₄ communion system

Characteristics of NaCl -KCl -Na2WO4 communion system was analyzed by three -electrode system and square wave voltammetry, focusing on the electrochemical behavior of the tungsten ion (VI). The results show that the characteristic peak of reduction process of W (Ⅵ)→W (Ⅳ) and W (Ⅳ)→W is overlapping, and the reduction process of tungsten ion (VI) is divided into two steps, that is W (Ⅵ)→W (Ⅳ)→W, of which the first step is reversible, while the second step, W (IV)→W, is irreversible.