Abstract
Flash desorption by a new technique has been applied to the study of oxygen desorption from powdered oxides of the first transition period (TiO 2, V 2O 5, Cr 2O 3, MnO 2, Fe 2O 3, Co 3O 4, NiO, CuO, ZnO). Thermodesorption “spectra” show a small number of well-resolved peaks: one, two or three states of binding are found for oxygen, each one characterized by a calculated activation energy. Population of these states changes with preliminary treatment of the metal oxide. The results are compared with literature data on “oxygen mobility” resulting from other experimental techniques, and with the known activity pattern of these oxides in oxidation catalysis.
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