Summary.
The effect of the synthesis conditions of individual and modified with Mn Ni- and Co-oxide systems on the content and the mobility of their active oxygen has been studied by means of chemical and IR spectral analyses. The results obtained show that the main part of the active oxygen in Ni-oxide system is located on the catalyst’s surface (Os * is approximately 73% of the total active oxygen), while Co-oxide system is characterized by much lower surface active oxygen content. Ni- and Co-oxide systems modified with Mn have comparatively higher active oxygen content as compared to the individual ones. Data of the IR spectral analysis reveal that Mn, as a modifying component, affects the mobility of the active oxygen, the latter contributing to the activity of oxide systems in oxidation processes. The high content of loosely bonded active oxygen formed during the synthesis determines a high catalytic activity of the studied samples in reactions of complete oxidation in the low temperature region.
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Christoskova, S., Stoyanova, M. & Vasilev, D. Active Oxygen in Oxide Catalytic Systems for Environmental Catalysis. Monatsh. Chem. 137, 1043–1051 (2006). https://doi.org/10.1007/s00706-006-0508-y
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DOI: https://doi.org/10.1007/s00706-006-0508-y