Charge dependence of free energy of adsorption at the electrode-solution interface

Abstract

Publication cost assisted by the Consiglio Nazionale delle Ricerche Adsorption isotherms in which polarization energy of adsorbed ions is taken into account are examined. Under some extrathermodynamic assumptions, the dependence of the isotherm parameters In ß and A upon the electrode coverage and charge density qM are evaluated. Whereas the zero-polarization assumption of Levine, Bell, and Calvert leads to a linear dependence of In ß on qM, a quadratic dependence appears in the extended theory as a natural consequence of electrostatic interactions. Experimental data on (BPh4) -ion adsorption are in reasonable agreement with the above analysis.