摘要
对于含有一个吸附中间物的不可逆连续电行传递反应，在较低的过电位下，电极过程的Faraday阻抗通常在复平面上显示一个低频感抗弧．在较高的过电位下，这个感抗弧将转化为容抗弧，这一转变预示着速控步骤的变化．相反，当反应速率一直被其中的一个步骤控制时，它的法拉第弛豫始终表现出容抗行为．
For an irreversible consecutive charge-transfer reaction with an adsorbed intermediatespecies. its faradaic impedance usually displays a low frequency inductive are in the complex planeat the lower overpotentials. Moreover, the inductive are will transform into a capacitive one atthe higher overpotentials, which imphes a change of the rate-determining step for this reaction.On the contrary the faradaic relaxation at low frequency shows the capacitive behavior providedteh rate of reaction is controlled by one step all along the reaction.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1998年第9期833-840,共8页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
金属腐蚀与防护国家重点实验室资助
关键词
吸附中间物
法拉第弛豫
电化学阻抗谱
电极过程
Adsorbed intermediate species, The faradaic relaxation Electrochemical Impedance Spectroscopy(EIS)
