Abstract
AbstractNiobium‐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 CeO2 for all the doped samples. The T50 temperature of the pure CeO2 sample was more significant than that of bare soot. The high catalytic activity of the CeO2 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 CeO2 when compared to Nb‐doped samples. CeO2 resulted in better soot oxidation activity with low activation energy.
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