Quasi-chemical Approximation for Solvent Dipoles at Metal/Electrolyte Interface
The methodology for deriving the differential capacitance at electrochemical interfaces using quasi-chemical approximation is demonstrated for adsorption of solvent dipoles in two configurational states. Explicit results for dipole potential (gdip) and the inner layer capacitance (Ci) are reported. The experimentally observed linear correlation between (1/Ci) and gdip, the negative temperature coefficient of the dipole potential at the potential of zero charge, and the occurrence of capacitance maximum at positive charge densities are discussed.
Saradha
R
Department of Chemistry, Indian Institute of Technology, Madras, 600 036, India
Sangaranarayanan
MV