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

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Helmenstine, Anne Marie, Ph.D. "Standard Hydrogen Electrode Definition." ThoughtCo, Jun. 19, 2014, thoughtco.com/definition-of-standard-hydrogen-electrode-605683. Helmenstine, Anne Marie, Ph.D. (2014, June 19). Standard Hydrogen Electrode Definition. Retrieved from https://www.thoughtco.com/definition-of-standard-hydrogen-electrode-605683 Helmenstine, Anne Marie, Ph.D. "Standard Hydrogen Electrode Definition." ThoughtCo. https://www.thoughtco.com/definition-of-standard-hydrogen-electrode-605683 (accessed January 19, 2018).