Enhancement of the Generation and Transfer of Active Oxygen in Ni/CeO2 Catalysts for Soot Combustion by Controlling the Ni–Ceria Contact and the Three-Dimensional Structure
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Título: | Enhancement of the Generation and Transfer of Active Oxygen in Ni/CeO2 Catalysts for Soot Combustion by Controlling the Ni–Ceria Contact and the Three-Dimensional Structure |
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Autor/es: | Sellers Antón, Begoña | Bailón-García, Esther | Cárdenas-Arenas, Andrea | Davó-Quiñonero, Arantxa | Lozano-Castello, Dolores | Bueno López, Agustín |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medio Ambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica |
Palabras clave: | Soot | Nickel | Ceria | 3DOM | NOx |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 16-ene-2020 |
Editor: | American Chemical Society |
Cita bibliográfica: | Environmental Science & Technology. 2020, 54(4): 2439-2447. doi:10.1021/acs.est.9b07682 |
Resumen: | The effect of the three-dimensionally ordered macroporous (3DOM) structure and the Ni doping of CeO2 on the physicochemical properties and catalytic activity for soot combustion was studied. Moreover, the way in which Ni is introduced to the ceria support was also investigated. For this, CeO2 supports were synthesized with uncontrolled (Ref) and 3DOM-structured morphology, and their respective Ni/CeO2 catalysts were prepared by impregnation of the previously synthesized supports or by successive impregnation of both precursors (Ni and Ce) on the 3DOM template. Conclusions reached in this study are: (1) the 3DOM structure increases the surface area of the catalysts and improves the catalyst–soot contact. (2) The doping of CeO2 with Ni improves the catalytic activity because the NiO participates in the catalytic oxidation of NO to NO2, and also favors the production of active oxygen and the catalyst oxygen storage capacity. (3) Ni incorporation method affects its physicochemical and catalytic properties. By introducing Ni by successive infiltration in the solid template, the CeO2 crystal size is reduced, Ni dispersion is improved, and the catalyst reducibility is increased. All of these characteristics make the catalyst synthesized by successive infiltration to have higher catalytic activity for soot combustion than the Ni-impregnated CeO2 catalyst. |
Patrocinador/es: | The authors thank the financial support from the Spanish Ministry of Economy and Competitiveness (Project CTQ2015-67597-C2-2-R and Grant FJCI-2015-23769), the Spanish Ministry of Education, Culture and Sports (Grant FPU14/01178), Generalitat Valenciana (Project PROMETEO/2018/076), and the UE (FEDER funding). |
URI: | http://hdl.handle.net/10045/103067 |
ISSN: | 0013-936X (Print) | 1520-5851 (Online) |
DOI: | 10.1021/acs.est.9b07682 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 American Chemical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1021/acs.est.9b07682 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2020_Sellers-Anton_etal_EnvironSciTechnol_final.pdf | Versión final (acceso restringido) | 3,42 MB | Adobe PDF | Abrir Solicitar una copia |
2020_Sellers-Anton_etal_EnvironSciTechnol_accepted.pdf | Accepted Manuscript (acceso abierto) | 867,95 kB | Adobe PDF | Abrir Vista previa |
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