Journal of Electroanalytical Chemistry, Vol.436, No.1-2, 109-118, 1997
A surface analytical investigation of the electrochemical double layer on silver electrodes in chloride solutions
The electrochemical double layer on Ag in NaCl solutions was examined with X-ray photoelectron spectroscopy (XPS) and ion scattering spectroscopy (ISS). The potential dependent surface concentration of the adsorbed species (Na+, Cl-, H2O) as well as the cationic excess charge was determined. The specific adsorption of Cl- is accompanied by coadsorption of cations and water. Angle-resolved XPS measurements and ISS experiments gave more detailed information about the structure of the double layer perpendicular to the silver electrode surface. A layered structure of the specifically adsorbed chloride anions and the coadsorbed cations was determined, in agreement with recently published studies.
Keywords:ENERGY ION SCATTERING;EMERSED ELECTRODES;SINGLE-CRYSTALS;PHOTOELECTRON-SPECTROSCOPY;SPECIMEN TRANSFER;CLOSED SYSTEM;ADSORPTION;XPS;ISS;DEPOSITION