物理化学学报 >> 1990, Vol. 6 >> Issue (05): 568-574.doi: 10.3866/PKU.WHXB19900511

研究论文 上一篇    下一篇

电极/溶液界面单分子吸附层的统计力学处理 I. 非水溶液中汞电极的内层微分电容

苏文煅; 周小林   

  1. 厦门大学化学系;厦门大学计算中心
  • 收稿日期:1989-01-24 修回日期:1990-04-20 发布日期:1990-10-15
  • 通讯作者: 苏文煅

Statistical Mechanical Treatment of Absorbed Monolayer at Electrode/Solution Interface I. The Inner-layer Differential Capacity for Mercury Electrode in Non-aqueous Solution

Su Wen-Duan; Zhou Xiao-Lin   

  1. Department of Chemistry, Xiamen University; Computer Center, Xiamen University
  • Received:1989-01-24 Revised:1990-04-20 Published:1990-10-15
  • Contact: Su Wen-Duan

摘要: 本文提出电极/溶液界面溶剂化层偶极取向分布模型, 应用统计力学方法及热力学平衡条件导出普遍化的单层吸附等温方程, 其电解质溶液的溶剂组成可以是纯态的或混合物(多组份)的. 文中分别以甲酰胺、碳酸亚乙酯和甲醇等三种纯溶剂的汞/溶液界面为例, 采用曲线拟合计算内层微分电容随表面电荷变化关系。预计本模型处理对汞/水溶液或汞/(混合溶剂)溶液界面仍可适用。

Abstract: A model of dipole orientation distribution for solvate layer at electrode/solution interface was suggested, and based on this model a generalized monolayer adsorption isotherm was derived by using the method of statistical mechanics and assuming the equilibrium condition of thermodynamics. The solvent of the electrolyte studied may be single component or multic-components (mixture). The dependence of inner-layer differential capacity upon snrface charge density at mercury electrode in formamide, methanol and ethylene carbonate solutions was estimated by curve-fitting respectively. The present model is more suitable for aqueous and mixed-solvent systems will be expected.