OXYGEN-CHEMISORPTION BY SNO2-BASED OXIDE ELECTRODES IN SOLID ELECTROLYTES

Processes of oxygen adsorption and desorption were studied on surfaces of tin dioxide, solid solutions of SnO2, with vanadium oxide, and at the SnO2-V2O5/Na5GdSi4O12 interface. Uncharged molecular, ionized mole cular, and ionized atomic forms of chemisorbed oxygen were found to be formed on the oxide semiconductor surface. The parameters of formatio n and decomposition of these forms were calculated, and their dependen ce on dopant concentration determined. It was found that ionized atomi c oxygen is not desorbed from the surface of the semiconducting oxides in contact with the solid electrolyte but becomes part of the solid e lectrolyte,