对位叠式循环方波伏安法 Ⅱ.平行催化体系

Checking Potential Additive Cyclic Square Wave Voltammetry II . Catalytic Electrode System

本文提出平行催化体系的对位叠式循环方波伏安法,并对其作了系统的研究;推导了这一方法的催化电流理论方程,并用实验验证这理论的正确性;得到其各脉冲电流皆为同方向,对位叠式循环催化电流相当于将电流叠加4次,而波形不受方波幅度大小的影响,因而灵敏度和分辨率有较大提高,优于其它方波伏安法.

This paper presents the additive cyclic square wave voltammetry and checking potential additive cyclic square wave voltammetry for catalytic electrode system. The theoretical catalytic current equations have been derived. Ti(IV)-H2C2O4-KClO3 system is used to verify the theory, and experimental results consist with the theoretical conclusions. The checking potential cyclic additive current is obtained by adding the pulse currents with the same sense four times, and the shape of the wave is not affected by the values of square wave amplitude. So the sensitivity and resolution are increased. This method is better than the other square wave voltammetries.