hydrogen gas electrode

https://doi.org/10.1351/goldbook.H02900
A thin foil of platinum electrolytically coated with a finely divided deposit of platinum or palladium metal, which catalyses the
electrode reaction
: H++e12H2 in solutions saturated with hydrogen gas.
Source:
PAC, 1985, 57, 531. (Definition of pH scales, standard reference values, measurement of pH and related terminology (Recommendations 1984)) on page 540 [Terms] [Paper]