Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 18, Issue 5, Pages 1231-1238Publisher
SPRINGER
DOI: 10.1007/s10008-013-2287-9
Keywords
Thermodynamics; Surface tension; Surface stress; Maxwell relations; Electrochemical potential; Gokhshtein relations
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The terminology and definition of surface tension are discussed. In particular, the surface tension is defined as the partial derivative of the surface excess Gibbs energy with respect to an infinitesimal increment of surface area at constant temperature and pressure. The surface tension is also formulated as the sum of a stress-free component and a stress-containing component. The stress-containing component is defined as the surface stress. Finally, the case of charged surfaces is analyzed, and the Gokhshtein relations are derived from the Gibbs potential in the special case that the electrode/solution interface is ideally polarizable.
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