It is reported that the presence of ion pairs can significantly impact the kinetics of electrochemical reactions. While ion pairing in concentrated aqueous solutions is widely reported, comparatively less is known about ion pairing and ion solvation at electrified interfaces, although there is some theoretical evidence that suggestions ion pairing is enhanced near an aqueous electrode interface. Solvent separated ion pairs of alkali halides were observed at negative applied potentials on a silver electrode using surface-enhanced Raman spectroscopy (SERS). In that study, the observed SERS spectra of water were shown to depend both on the cation composition and the applied potential, which was explained by the gradual desolvation of cations at negative surface potentials leading the interfacial accumulation of solvent-separated ion pairs. Zou et al. studied the structure of water on silver electrodes in alkali sulfate and perchlorate solutions. They found that the effect of the anion on the Raman spectra of water is significant, even at negative potentials. This result is somewhat counterintuitive since anions would be repelled from negatively charged surfaces; however, this was attributed to the formation of ion pairs at the interface.