中性载体K^+与pH电极响应机理的液-液界面电化学研究

Liquid-liquid Interface Electrochemical Study on Response Mechanism of pK and pH Electrodes based on Neutral Carriers

利用循环伏安法和循环线性电流扫描计时电位法,详细研究了在一系列中性载体化合物存在下钾离子和氢离子在水—硝基苯相界面上的传输,描述了传输的可能机理,并计算了相应的热力学常数。电化学研究结果与基于上述中性载体的pK和pH电极的响应性能之间有良好的相关性,这表明液—液界面电化学的研究方法为液膜电极的机理研究提供了一种有价值的手段。

The transfer of potassium and hydrogen ion between water and nitrobenzene phases was studied in detail using cyclic voltammetry ( CV ) and cyclic linear current scan chronopotentiometry ( CLC ) in the presence of different neutral carriers. The possible transfer mechanism was descrided and related thermodynamical parameters were calculated. Good correlation between the results of electrochemical study and response performances of the electrodes based on corresponding neutral carriers was observed. It shows that liquid-liquid interface electrochemical study can provide a valuable method for mechanistic study of liquid membrane electrodes.