Accession Number : AD0283681

Title :   COULOSTATIC STUDY OF ADSORPTION KINETICS AT A METAL-ELECTROLYTE INTERFACE. I. THEORY

Corporate Author : LOUISIANA STATE UNIV BATON ROUGE

Personal Author(s) : DELAHAY,PAUL

Report Date : MAY 1962

Pagination or Media Count : 1

Abstract : Variations of the surface concentration and ptotential with time are derived for the coulostatic method for an adsorption process obeying the logarithmic Temkin isotherm at equilibrium at an ideal polarized electrode and for mixed control by semi-infinite linear diffusion and adsorption kinetics. It is assumed that the charge density on the electrode varies according to a step-function of time in such a way that the cell with the ideal polarized electrode is essentially at open circuit after the abrupt change of charge density. Limiting cases corresponding to pure control by either adsorption kinetics or diffusion are also considered. The evaluation of the adsorption exchange rate from potential-time variations is indicated. A coulostatic method was suggested for the study of adsorption kinetics of a neutral substance at a metal-electrolyte interface. The influence of mass transfer control was not considered. The more general case with control by adsorption kinetics and mass transfer, as determined by semi-infinite linear diffusion, i analyzed here. (Author)

Descriptors :   *ADSORPTION, *ELECTROLYSIS, *METALS, REACTION KINETICS, SURFACES, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE