1-pKand 2-pKProtonation Models in the Theoretical Description of Simple Ion Adsorption at the Oxide/Electrolyte Interface:  A Comparative Study of the Behavior of the Surface Charge, the Individual Isotherms of Ions, and the Accompanying Electrokinetic Effects

2001 ◽  
Vol 105 (40) ◽  
pp. 9755-9771 ◽  
Author(s):  
Wojciech Piasecki ◽  
Władysław Rudziński ◽  
Robert Charmas
Keyword(s):  
Comparative Study ◽  
Surface Charge ◽  
Theoretical Description ◽  
Ion Adsorption ◽  
Electrolyte Interface ◽  
The Individual ◽  
Oxide Electrolyte

Transition layer model of the oxide–electrolyte interface

1978 ◽  
Vol 56 (5) ◽  
pp. 595-605 ◽  
Author(s):  
Michael J. Dignam
Keyword(s):  
Surface Charge ◽  
Transition Layer ◽  
Essential Feature ◽  
Ionic Species ◽  
Glass Electrode ◽  
Oxide Glass ◽  
Detailed Structure ◽  
Layer Model ◽  
Electrolyte Interface ◽  
Oxide Electrolyte

A model of the oxide–electrolyte interface is proposed which accounts both for the Nernstian behaviour of the oxide (glass) electrode and the anomalous capacitance values of some oxides defined in terms of the change in surface charge with pH. The essential feature of the model is the existence of a transition layer of atomic dimensions in thickness within which is established an equilibrium between oxide and aqueous ionic species. The Nernstian behaviour of the oxide (glass) electrode is independent of the model chosen for the oxide–electrolyte double layer but requires that the oxide be conducting; the capacitance of the system, of course, is dependent on the detailed structure of the interface.

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