Standard electrode potential (data page)

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The values of standard electrode potentials are given in the table below in volts relative to the standard hydrogen electrode and are assembled from references [1] [2] [3] [4] [5] [6] [7] [8]


The values are for the following conditions:

  • the temperature of 298.15 K (25 °C);
  • the effective concentration of 1 mol/L for each aqueous species or a species in a mercury amalgam;
  • the partial pressure of 101.325 kPa (absolute) (1 atm, 1.01325 bar) for each gaseous reagent. This pressure is used because most literature data are still given for this value rather than for the current standard of 100 kPa.
  • the activity of unity for each pure solid, pure liquid, or for water (solvent).

Legend: (s) – solid; (l) – liquid; (g) – gas; (aq) – aqueous (default for all charged species); (Hg) – amalgam.

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