Elements of the Thermodynamic Theory of Electrified Interfaces

  • Gyözö G. Láng
  • Cesar A. Barbero
Part of the Monographs in Electrochemistry book series (MOEC)


In Chap. 2, several aspects of the thermodynamic theory and their physical interpretation are discussed, and a simple and concise treatment of electrified interfaces within the framework of classical thermodynamics is presented. Basic concepts such as “surface,” “interface,” “interphase,” “interfacial or interface region,” “dividing surface,” and “adsorption” are reviewed; Gibbs and Guggenheim models in interfacial thermodynamics are discussed. The derivation of the electrocapillary equation, the Lippmann equation, and the Gibbs adsorption equation for an ideally polarizable electrode is presented. An example for the application of the electrocapillary equation is provided. An equation has been derived for ideally polarizable electrodes for the case in which there is no complete equilibrium between the bulk of a solid and the interface.


Reference System Interfacial Region Fundamental Relation Specific Surface Energy Excess Gibbs Free Energy 
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© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Inst. ChemistryEötvös Loránd UniversityBudapestHungary
  2. 2.Chemistry DepartmentUniversidad Nacional de Rio CuartoRio Cuarto CórdobaArgentina

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