The observation of solvated metal ions in the double layer region at silver electrodes using surface enhanced raman scattering

Abstract

The SERS spectra of water observed when halide ions are adsorbed to roughened silver electrodes is shown to be dependent upon the nature of the supporting electrolyte cation. This cation dependence as well as the potential dependence for any given cation are interpreted as being due to the progressive desolvation of cations with increasing radius and with increasingly negative potentials, the cations being adsorbed as solvent separated ion pairs.