The formal potentials and electrode kinetics of the proton/hydrogen couple in various room temperature ionic liquids

The Hydrogen evolution reaction has been quantitatively investigated at a Pt electrode in series of room temperature ionic liquids vs. Ag/Ag+ redox couple. The measured formal potentials of the H2/H+ ( HNTf2) redox couple in each RTIL reveals a dependence on the nature of anion, suggesting significant interaction between proton and anion.