析氢反应动力学的交流阻抗法研究

Study of Kinetics of Hydrogen Evolution Reactions by AC Impedance Technique

利用交流阻抗法测定析氢电化学动力学参数，得到与极化曲线法一致的结果，为确定复杂析氢过程速率的决定步骤提供了判据。

A new approach was developed for the kinetic study of hydrogen evolution reac-tion in alkaline solution at inert electrodes.By impedance meastirements of the charge trans-fer resistance(R_(ct))at various overpotentials (η)and extrapolation of the linear η vs.log plot to zero overpotential, kinetic parameters such as i0,b and a can be obtained which are infairly good agreement with those obtained by polarization method.This approach can also beused to determine the rate determining step of a complicated reaction involving hydrogendesorption.