QUASI-CHEMICAL APPROXIMATION FOR SOLVENT DIPOLES AT METAL ELECTROLYTEINTERFACE/

The methodology for deriving the differential capacitance at electroch emical interfaces using quasi-chemical approximation is demonstrated f or adsorption of solvent dipoles in two configurational states. Explic it results for dipole potential (g(dip)) and the inner layer capacitan ce (C-i) are reported. The experimentally observed linear correlation between (1/C-i) and g(dip), the negative temperature coefficient of th e dipole potential at the potential of zero charge, and the occurrence of capacitance maximum at positive charge densities are discussed. (C ) 1996 Academic Press, Inc.