Abstract
A two-state multi-site statistical mechanical model is analysed for the case of neutral organic compounds electrosorption from solution. The derived adsorption isotherm takes into account on a molecular level both the short-range particle-particle interactions and the field effects on the adsorbed molecules. It is also applicable to any kind of adsorbate and solvent molecules, irrespective of whether they are rigid linear or non-linear, open flexible or ring molecules and they occupy one or more lattice sites. The validity of this isotherm is tested by comparison with the experimental data of 2-butanol adsorption at the mercury—aqueous solution interface. It is found that the isotherm follows fairly well the experimental data only for low values of the size ratio parameter. However, the best fits are attained when some of the molecular parameters of the model take inappropriate values.
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