Standard Hydrogen Electrode Definition

Definition: The standard hydrogen electrode is the standard measurement of electrode potential for the thermodynamic scale of redox potentials.

The standard is determined by the potential of a platinum electrode in the redox half reaction

2 H+(aq) + 2 e- → H2(g) at 25 °C.

The standard hydrogen electrode is often abbreviated SHE.

Also Known As: normal hydrogen electrode or NHE