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Ceria-zirconia Nanocatalysts for Diesel Soot Combustion
Technical Paper
2015-24-2514
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A set of ceria-zirconia nanocatalysts with different Zr-contents and structural properties was prepared to study the effect of both the Zr-amount and surface-dependent activity towards soot combustion in “loose” and “tight” soot-catalyst contact. The properties of the catalysts were examined using several physico-chemical techniques. The best soot oxidation activities were achieved for the Ce0.9Zr0.1O2-NP catalyst (NP means nano-polyhedra and 0.9 indicates the atomic ratio of Ce/Ce+Zr), due to its easier reducibility, compared to high-surface area catalysts with the same Ce/Zr ratio. Moreover, better performances were reached for Ce0.9Zr0.1O2-NP, than similar nano-polyhedra with higher Zr-amounts (denoted as CexZr1-xO2-NP, where x = 0.8 or 0.7). On the other hand, worse activities were obtained for both mesoporous and microporous catalysts with the same Ce/Zr ratio.
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Piumetti, M., Bensaid, S., and Russo, N., "Ceria-zirconia Nanocatalysts for Diesel Soot Combustion," SAE Technical Paper 2015-24-2514, 2015, https://doi.org/10.4271/2015-24-2514.Also In
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