- noun an electrode created by adsorbing hydrogen onto a platinum electrode, which is then set to zero potential and used to compare other results.
- A standard reference electrode usually consisting of a solution containing hydrogen atoms at a unit concentration, into which a platinum electrode is immersed, and over which hydrogen gas is passed at a specific pressure. This electrode has an arbitrarily assigned potential of zero, and other electrode potentials are compared to it. Also called standard hydrogen electrode.
- An electrode consisting of a solution containing hydrogen atoms, into which an electrode of a noble metal is immersed, and over which hydrogen gas is passed. The noble metal usually used is platinum.