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EFFECT OF PREPARATION PROCEDURE ON FORMATION OF CERIUM AND MANGANESE OXIDES
Abstract
The current investigation is focused on the preparation and characterization of cerium and manganese oxides by two different but easy to implement procedures and their application as catalysts for ethyl acetate total oxidation, as one of the most difficult to completely oxidize VOC pollutant. The elucidation of the relation between the preparation procedure used and the structure, texture, morphology, surface and catalytic properties of the obtained materials was the main challenge in the study. For the purpose, the obtained materials were characterized by a complex of different physicochemical techniques, such as nitrogen physisorption, XRD, SEM and Raman spectroscopies and TPR with hydrogen. The results show high dependency of the materials catalytic properties on the synthesis method. It was found that the varying fractions of redox-active Mn2+/Mn3+/Mn4+ surface sites and the high proportion of oxygen species together with the particle dispersion and morphology are important for high specific catalytic activity of MnxOy in investigated catalytic reaction.
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