A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity‡
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
John Wiley and Sons Inc
Abstract
Niobium-doped ceria catalysts were synthesized to study soot oxidation activity. X-Ray diffraction (XRD) and Raman analysis of the samples revealed the presence of a fluorite structure of CeO<inf>2</inf> for all the doped samples. The T<inf>50</inf> temperature of the pure CeO<inf>2</inf> sample was more significant than that of bare soot. The high catalytic activity of the CeO<inf>2</inf> catalyst can be attributed to the low crystallite size, high facet ratio, and the large Brunauer-Emmett-Teller (BET) surface area as compared to Nb-doped samples. The activation energy calculated by both Ozawa and KAS methods were found to be low for CeO<inf>2</inf> when compared to Nb-doped samples. CeO<inf>2</inf> resulted in better soot oxidation activity with low activation energy. © 2022 Wiley-VCH GmbH
Description
Keywords
Activation energy, Catalyst activity, Crystallite size, Dust, Fluorspar, Niobium, Niobium compounds, Oxidation, Soot, Ceria catalysts, Diffraction analysis, Doped ceria, Doped sample, Effect of niobium, Nb doped, Oxidation activities, Soot oxidation, Synthesised, X- ray diffractions, Cerium oxide
Citation
Chemical Engineering and Technology, 2022, 45, 3, pp. 517-525