Croatica Chemica Acta, Vol. 76 No. 4, 2003.
Original scientific paper
Theoretical Description of Calorimetric Effects of Proton Adsorption on Metal Oxides from Electrolyte Solutions Based on 1-pK and 2-pK Surface Protonation Models
Władysław Rudziński
; Department of Theoretical Chemistry, Faculty of Chemistry, Maria Curie Sklodowska University, Pl. Marii Curie Sklodowskiej 3, 20-031 Lublin, Poland
Wojciech Piasecki
; Group for Theoretical Problems of Adsorption, Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Ul. Niezapominajek 8, Kraków, 30-239 Poland
Abstract
A rigorous thermodynamic description of ion adsorption on metal (hydr)oxide/electrolyte solution interface, including calorimetric effects, is given. Temperature dependence of potentiometric titration curves for suspensions, the heat (enthalpy) of proton adsorption, and the influence of surface potential on calculated quantities are analyzed. The calculations were based on the 1-pK Basic Stern Model (BSM) and the 2-pK Triple Layer Model (TLM) of the oxide/electrolyte interface. Comparison of the results obtained by means of these two models with experimental data is presented.
Keywords
metal oxide; ion adsorption; heat of adsorption; protonation models
Hrčak ID:
103188
URI
Publication date:
28.11.2003.
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