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This work reports a study of oxygen mobility in a variety of LaCo 1−x Fe x O 3 perovskites. The methods used to evaluate oxygen reactivity were temperature programmed oxygen desorption and oxygen isotopic exchange. Three kinds of oxygen are distinguished, depending on their reactivities. First, surface oxygens were found to be the most active forms of oxygen. In oxygen desorption...
In this study, oxygen mobility in LaCoO 3 was studied by means of oxygen isotopic exchange. Seven LaCoO 3 were synthesized by different methods and characterized. The solids present large differences in specific surface area, crystallite size, and redox properties (as measured by oxygen desorption and reduction by H 2 ). The results obtained for the exchange reaction showed...
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