急求助电化学阻抗图谱和电化学极化图分析？

The size of the semicircle on the left is consistent with charge-transfer resistance ( Rct ) between the electrode and electrolyte, inverse to the catalytic activity of counter electrodes. 这是文章中 ... 相关的理论知识请参见胡会利主编的《电化学测量》pp33-35

LZ所给的应该是弱极化体系，极化曲线中，dE/di求微分就是极化电阻，也就是LZ所说的0V处的斜率，文献所提的极化电阻应该只包括欧姆阻抗Rs和电化学转移电阻Rct。更详细的电极过程分析得看了文献才能知道。图中将电压 ... The size of the semicircle on the left is consistent with charge-transfer resistance ( Rct ) between the electrode and electrolyte, inverse to the catalytic activity of counter electrodes. 这是文章中说的第三个图。我想问的是那个小圆的半径是否就是Rct？另外，你上面所说的那个极化电阻是两个电阻之和的倒数？还望耐心解答，