Standard electrode potential (data page)

The standard electrode potentials are electrode potentials of half cells at equilibrium. They can be used to determine the potential of an electrochemical cell or galvanic cell, or a position of equilibrium for an electrochemical (redox) reaction, or a direction in which an electrochemical reaction can (thermodynamically) proceed.

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 .

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,
 * 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, a species in a mercury amalgam, or for water (solvent).

The table can be sorted alphabetically by clicking at the column heading. Click on the other column to re-sort by potential. This doesn’t work in Safari (even v. 3.1.1); reload the page to restore the original order.

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