根据反应体系的物理意义发现,电化学反应中吸附态中间产物的存在类似于在一个简单的电化学反应机理的等效电路模型上增加一个电容和电阻并联的复合元件.提出了一个模拟电极反应中出现吸附态中间产物反应过程的等效电路.根据阻抗理论,初步证明了所提出的等效电路的合理性.最后,利用铁基体上析氢反应对模型做了进一步的试验验证.根据试验确定了铁基体上氢析出反应2种不同机理所对应的过电位区间,即在0.04 V过电位以下,铁基体上析氢反应为电化学复合脱附机理;过电位高于0.15 V,铁基体上析氢反应为化学复合脱附机理,在中高过电位和低过电位之间存在一个不稳定的过渡区.
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