物理化学学报 >> 1994, Vol. 10 >> Issue (12): 1066-1070.doi: 10.3866/PKU.WHXB19941203

研究论文 上一篇    下一篇

溶剂分子性质与界面内层微分电容变化特性

苏文煅   

  1. 厦门大学化学系，厦门 361005
  • 收稿日期:1993-09-28 修回日期:1994-01-13 发布日期:1994-12-15
  • 通讯作者: 苏文煅

Properties of Solvent Molecules and the Characteristic Variations of Inner Layer Differential Capacity

Su Wen-Duan   

  1. Department of Chemistry,Xiamen University,Xiamen 361005
  • Received:1993-09-28 Revised:1994-01-13 Published:1994-12-15
  • Contact: Su Wen-Duan

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摘要：

依照前文[1]设立的偶极取向分布模型，利用模拟的C1（σ）假想曲线阐析溶剂分子性质对电极／溶液界面内层微分电容的影响趋向，理想的C1（σ）拟合曲线表现出单峰或双峰的两种基本式样，而溶剂分子的极化，各态偶极取向能的差别以及偶极间的相互作用均将导致C1（σ）曲线明显形变．据此，可从分子的性质预测各类电极／溶液界面体系C1（σ）曲线变化特性.

关键词: 电极/溶液界面, 双电层, 内层微分电容

Abstract:

The influence of solvent porperties on the inner layer capacity C1(σ)for electrode/solution interface is analysed by means of curve-fitting to hypothetic C1(σ)variance based on the model of dipole orientation distribution presented in previous papers[1,2].The profile of fitting curve exhibits one or two peaks in the variation of C1 with σ (surface charge density), corresponding to two main types of idealy C1 (σ) curves. However, the shape of C1(σ)courve would be deformed due to the effects of molecular polarization, the difference of dipo1e orientation energies relating to different orientated states and the interaction between dipoles in solvent monolayer at electrode/solution interface. Therefore the characteristic variation of C1(α) profile can be predicted by the solvent natures for variously real electrode/ solution systems.

Key words: Electrode/solution ineerface, Electrical double layer, Inner layer differential capacity