Term: equilibrium electrode potential
https://doi.org/10.1351/goldbook.09064

Definition:
Potential of an electrode when no electric current flows through the cell and all local charge transfer equilibria across phase boundaries that are represented in the cell diagram (except at possible electrolyte-electrolyte junctions) and local chemical equilibria are established.

Notes:
1) Temperature and activities of relevant species must be specified.
2) \(E_{\rm{eq}}\) is related to the standard electrode potential by the Nernst equation.

Related Term: nernst equation (http://doi.org/10.1351/goldbook.09068).
Related Term: electrode (http://doi.org/10.1351/goldbook.09060).

Source: PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 648 (https://doi.org/10.1515/pac-2018-0109)

Citation: 'equilibrium electrode potential' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.09064

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