Simple models for adsorption on electrodes

Adsorption Properties of Cryptand 222 at the Charged Mercury−Solution Interface

“…Plots in Figures and resemble the usual experimental adsorption behavior of neutral organic compounds, as also predicted by electrostatic adsorption models (see, e.g., refs and ). This aspect does not contradict the fact that, in the explored concentration range, K222 molecules should be almost entirely in their complexed state with a Na + cation inside the cage, as the high value of the K s constant (7.9 × 10 3 L/mol) 28 leads to [K222]/[K222 + ] ≤ 0.2% up to c = 10 -2 M in a medium containing 0.1 M Na + .…”

“…In the case of a polarized interface, the adsorption factor β depends upon the electrical state of the interface. Frequently electrostatic models containing a quadratic dependence of log (β) upon an electrical variable χ, either φ or σ M , have been used: β = c 0 exp[(Δ G 0 + A χ + B χ 2 )/ kT ] . This adds two more parameters to the model, A and B ; further “refinements” can be made by adding a dependence of Frumkin's interaction factor a upon Γ and/or the electrical variable, φ or σ M , thus increasing the number of adjustable parameters well above five.…”

2D Phase transition of organic molecules adsorbed at the Hg electrode/aqueous solution interface Part 2 Comparison of experimental data with model predictions

“…15,16 The values can also be discussed if, as a further approxc 0 imation, the a and a@ terms, in eqn. (8) °i.e. The inertial axis perpendicular to the ring (or rings) for the compounds here in study.…”

Role of electrolyte in the occurrence of the voltage induced phase transitions in a dioleoyl phosphatidylcholine monolayer on Hg

“…The phases existing at more negative applied potentials are associations of phospholipid with water with different conformations of the phospholipid as described in ref [54]. The field-driven phase transitions of DOPC on Hg are mechanistically different from the classical systems of 2D potential-induced phase transitions [55][56][57][58][59]. These classical phase transitions involve film condensations on Hg and are dependent on temperature.…”