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应用交流阻抗研究有法拉第吸附的电极过程

APPLICATION OF A.C.IMPEDANCE TECHNIQUE  TO INVESTIGATION OF THE ELECTRODE PROCESSES  CONTAINING FARADAIC ADSORPTION

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【作者】 马厚义程晓亮王超陈慎豪

【Author】 Ma Houyi Cheng Xiaoliang Wang Chao Chen Shenhao  (Dept.of Chem.,Shandong Univ.,Jinan)

【机构】 山东大学化学系

【摘要】 从理论上推导了金属阳极溶解所涉及的几种典型的伴有表面转化步骤的电极过程的交流阻抗表达式.视速控步骤及脱附步骤的不同,电极过程表现出不同的阻抗行为.同时也研究了吸附假电容的产生及在不同反应中的表现方式.对于连续溶解反应,出现低频感抗行为的一个重要特征是假电容为负值;而自催化反应则无上述规律,假电容通常大于0

【Abstract】 おァ he impedance expressions for several typical electrode processes involving Faradaic adsorption and the following different surface reactions in the anodic dissolution of metals were theoretically derived in this paper.The difference of the ratedetermine steps and the that of desorption steps followed by Faradaic adsorption led to the different EIS.In addition,the occurrence of pseudocapacitance and its behavior in the different reactions have been accounted for.Being different from the autocatalytic mechanism,the negative pseudocapacitance in consecutive dissolution mechanism is the important characteristic indicating the occurrence of inductive relaxation processes.

【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项目
  • 【文献出处】 山东大学学报(自然科学版) ,JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE EDITION) , 编辑部邮箱 ,1997年04期
  • 【分类号】O646
  • 【被引频次】7
  • 【下载频次】289
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