PIEZOELECTRIC RESPONSE TO SPECIFIC ADSORPTION OF CHLORIDE-IONS ON GOLD ELECTRODE

The specific adsorption of Cl− ions on gold electrode was investigated by a piezoelectric technique combined with admittance measurement. The specific adsorption contributed greatly to the piezoelectric signal produced by a potential modulation technique. Several parameters of the specific adsorption such as electrosorption valency, γ, and surface excess, Γad were evaluated from the piezoelectric signals. These results indicated that the specific adsorption of Cl− ions took place accompanying a partial charge transfer and induced the structural change of the electric double layer leading to the formation of a surface adsorption compound. © 1990, The Electrochemical Society, Inc. All rights reserved.