Study of adsorption of tetraethylammonium ions on Bi single crystal planes from solutions in ethanol

Adsorption of tetraethylammonium ions on Cd(0001) single crystal plane from solutions in ethanol

“…1 and 2 and as was mentioned in [12,13], the C-E curves on Cd electrode (as well as for Bi electrodes) for TEA salts in ethanol are not only very different from C-E curves for TAA salts in aqueous solutions [7], but are also different from C-E curves for these electrodes if adsorption of inorganic anions and cations in ethanol takes place [17][18][19]24,25]. It needs some more analysis to understand the reasons of the original shape of these C-E curves.…”

“…It needs some more analysis to understand the reasons of the original shape of these C-E curves. In our previous works [12,13] it was proposed that it may be caused by the simultaneous changes of distances of inner and outer Helmholtz planes from the electrode surface. However, in the work [27], the analogous effect in the KNO 3 + KF system was explained, relying on the different dependence of the inner layer capacitance on the electrode potential.…”

“…The experimental procedure in the present work was nearly the same as in our previous studies [12,13]. The Autolab PGSTAT 30 FRA 2 measuring system has been used for impedance measurements at the Cd(0 0 0 1)|ethanol interface.…”

“…Replacement of ethanol molecules with the TEA + ions on the electrode surface, should in turn accompany with much less change in dielectric properties of the electrical double layer than in aqueous solutions. The calculations, carried out for the TEA + cations [12,13] showed that the adsorption of these ions is generally weaker than adsorption of halide ions at the same interface. The obtained adsorption parameters allowed confirming that the specific interaction of TEA + ions with the electrode surface is weak and the main reason of adsorption is the ''squeezing-out" effect of the large ions from the bulk of solution, i.e.…”

“…In our previous studies [12,13] the adsorption of tetraethylammonium (TEA + ) cations on Bi(hkl) electrodes from solutions in ethanol has been demonstrated and analysed. It was found that in contrary to aqueous solutions the adsorption of TEA + cations can be described using the traditional calculation methods for the adsorption of inorganic ions.…”