Study of Ce/Pr ratio in ceria-praseodymia catalysts for soot combustion under different atmospheres
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http://hdl.handle.net/10045/101378
Títol: | Study of Ce/Pr ratio in ceria-praseodymia catalysts for soot combustion under different atmospheres |
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Autors: | Guillén Hurtado, Noelia | Giménez-Mañogil, Javier | Martínez-Munuera, Juan Carlos | Bueno López, Agustín | Garcia-Garcia, Avelina |
Grups d'investigació o GITE: | Materiales Carbonosos y Medio Ambiente |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Paraules clau: | Ceria-praseodymia | NO oxidation | Soot combustion | Active oxygen |
Àrees de coneixement: | Química Inorgánica |
Data de publicació: | 25-de gener-2020 |
Editor: | Elsevier |
Citació bibliogràfica: | Applied Catalysis A: General. 2020, 590: 117339. doi:10.1016/j.apcata.2019.117339 |
Resum: | The effect of Ce/Pr ratio on ceria-praseodymia on structural and surface properties is studied. The catalytic activity towards soot combustion under NOx/O2 and O2/N2 atmospheres is also evaluated, together with the NO oxidation activity to NO2. CexPr1-xO2-δ compositions (x = 0.8, 0.5 and 0.2) have been prepared along with ceria and praseodymia. Catalysts were prepared by co-precipitation. The Ce0.5Pr0.5O2-δ composition, was also prepared by nitrate calcination. Ceria-praseodymia mixed oxides yield reduction profiles shifted to lower temperatures, higher NO oxidation activities to NO2 and improved catalytic activities for soot combustion with respect to pure ceria. Ce0.5Pr0.5O2-δ was the most active one. Under NOx/O2, it has greater soot combustion activity if it is prepared by nitrate calcination. However, under O2/N2, the co-precipitation method is more favorable because of the better dopant insertion achieved in the ceria lattice, which seems to lead better oxygen mobility on the surface and in the bulk oxide. |
Patrocinadors: | The authors gratefully acknowledge the financial support of Generalitat Valenciana (PROMETEO/2018/076 project) and the Spanish Ministry of Economy and Competitiveness (CTQ2015-64801-R project) and the UE-FEDER funding. J.C.M.M. also acknowledges Spanish Ministry of Science, Innovation and Universities for the financial support through a FPU grant (FPU17/00603). |
URI: | http://hdl.handle.net/10045/101378 |
ISSN: | 0926-860X (Print) | 1873-3875 (Online) |
DOI: | 10.1016/j.apcata.2019.117339 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2019 Elsevier B.V. |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.1016/j.apcata.2019.117339 |
Apareix a la col·lecció: | INV - MCMA - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2020_Guillen-Hurtado_etal_ApplCatA_final.pdf | Versión final (acceso restringido) | 3,29 MB | Adobe PDF | Obrir Sol·licitar una còpia |
2020_Guillen-Hurtado_etal_ApplCatA_preprint.pdf | Preprint (acceso abierto) | 2,97 MB | Adobe PDF | Obrir Vista prèvia |
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