✍ Scribed by S. Arockiamary Arulraj; Michael Noel
No coin nor oath required. For personal study only.
The current-time transients for monolayer formation by simultaneous random adsorption as well as nucleation-growth-collision processes are discussed. In the recently proposed competitive combined model, the need for incorporating the adsorption effect in the nucleative component of the current response is clearly brought out. The difference between the transients with and without the correction factors are discussed. The potential step responses for a new non-competitive combined model where adsorption and nucleative processes account for finite fractions of the surface are also presented. NOMENCLATURE nucleation parameter (V) symmetry factor (assumed to be 0.5 in simulations) overvoltage (V) Faraday's constant lateral interaction parameter current (A) adsorption rate constant (s-' ) growth rate constant (s-') nucleation rate constant (SK') number of nuclei at any instant of time in unit area (number cn-") number of active centres in unit area (number cm-') total number of surface. sites in unit area (number cm-') number of electrons transferred monolayer charge (C cm-1 ) radius of growing centre (cm) S,, S extent ot coverage and true coverage by growtn t time (s) X coverage by adsorption or ad-atom coverage
📜 SIMILAR VOLUMES