NOx Adsorption Over Ce/Zr-Based Catalysts Doped with Cu and Ba

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Title: NOx Adsorption Over Ce/Zr-Based Catalysts Doped with Cu and Ba
Authors: Giménez-Mañogil, Javier | Martínez-Munuera, Juan Carlos | Matarrese, Roberto | Castoldi, Lidia | Lietti, Luca | Garcia-Garcia, Avelina
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Ceria-zirconia | Copper species | NOx adsorption | Nitrites/nitrates
Knowledge Area: Química Inorgánica
Issue Date: Feb-2019
Publisher: Springer US
Citation: Topics in Catalysis. 2019, 62(1-4): 140-149. doi:10.1007/s11244-018-1130-z
Abstract: In this study, Ce/Zr-based materials without noble metals in their formulation have been prepared, characterized and tested in NOx adsorption at different temperatures. In particular, the effect of the presence of Ba and Cu in the catalytic formulation has been investigated. The catalyst characterization shows that the redox properties of the catalysts are enhanced by Cu and inhibited by Ba. Upon interaction with NO/O2, it is found that NOx are stored at low temperatures (150 °C) in the form of nitrites, without any relevant NO oxidation activity. This suggests a direct NO uptake. At higher temperatures (300 °C) a significant NO oxidation activity is observed, that is enhanced by Cu and depressed by Ba. In this case, NOx are stored in the form of nitrates; the samples containing both Ba and Cu exhibits the better performances in terms of NOx adsorption capacity.
Sponsor: The authors gratefully acknowledge the financial support of Generalitat Valenciana (PROMETEOII/2018/076 project), the Spanish Ministry of Science, Innovation and Universities (CTQ2015-64801-R project) and the UE-FEDER funding. JCMM wishes to thank Spanish Ministry of Education and Professional Training his PhD contract within the FPU programme (Grant No. FPU17/00603).
ISSN: 1022-5528 (Print) | 1572-9028 (Online)
DOI: 10.1007/s11244-018-1130-z
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Springer Science+Business Media, LLC, part of Springer Nature 2019
Peer Review: si
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Appears in Collections:INV - MCMA - Artículos de Revistas

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