Effects of surface heterogeneity of oxides in simple ion adsorption at oxide/electrolyte interfaces

Adsorption ◽  
1996 ◽  
Vol 2 (3) ◽  
pp. 245-255 ◽  
Author(s):  
W. Rudziński ◽  
R. Charmas
Keyword(s):  
Surface Heterogeneity ◽  
Ion Adsorption ◽  
Oxide Electrolyte

scholarly journals On the Nature of the Energetic Surface Heterogeneity in Ion Adsorption at an Electrolyte/Oxide Interface. Theoretical Studies of the Correlations between Binding-to-Surface Energies of Various Surface Complexes

1996 ◽  
Vol 14 (1) ◽  
pp. 25-38 ◽  
Author(s):  
Wladyslaw Rudziński ◽  
Robert Charmas ◽  
Wojciech Piasecki
Keyword(s):  
Surface Heterogeneity ◽  
Ion Adsorption ◽  
Surface Oxygen ◽  
Oxide Interface ◽  
Surface Complexes ◽  
Surface Energies ◽  
Outermost Surface ◽  
Energetic Heterogeneity ◽  
Total Lack ◽  
Oxide Electrolyte

When a metal oxide is brought into contact with an electrolyte, the outermost surface oxygens adsorb one or two protons, a cation or an aggregate composed of two protons and an anion. In this way, various surface complexes are formed. The actual surfaces are, as a rule, geometrically distorted. This causes a variation of the binding-to-surface energy from one surface oxygen to another for each of these complexes. This energetic heterogeneity of the actual oxide surfaces strongly affects the adsorption of ions within the electrical double layer formed at the oxide/electrolyte interface. The way in which the surface heterogeneity affects the adsorption of ions depends on the correlations between the binding-to-surface energies of the various surface complexes. To date, two extreme models have been considered by us; one assuming the existence of very high correlations, and the other one assuming a total lack of correlation between binding-to-surface energies in going from one surface oxygen to another. This paper presents a theoretical study of ion adsorption based on the assumption of a partial correlation between the binding-to-surface energies.

Experimental Studies and Theoretical Interpretation of the Calorimetric Effects Accompanying Ion Adsorption at Oxide/Electrolyte Interfaces:  Application of Flow Adsorption Calorimetry†

Langmuir ◽  
1999 ◽  
Vol 15 (18) ◽  
pp. 5921-5931 ◽  
Author(s):  
Władysław Rudziński ◽  
Robert Charmas ◽  
Wojciech Piasecki ◽  
Alexander J. Groszek ◽  
Fabien Thomas ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Theoretical Interpretation ◽  
Ion Adsorption ◽  
Adsorption Calorimetry ◽  
Oxide Electrolyte
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