Effect of the CeZrNd mixed oxide synthesis method in the catalytic combustion of soot

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Title: Effect of the CeZrNd mixed oxide synthesis method in the catalytic combustion of soot
Authors: González Mira, Jorge | Rico Pérez, Verónica | Bueno López, Agustín
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: Diesel soot | Ceria–zirconia catalyst | Neodymium–ceria catalyst | Mixed oxide catalyst | Ceria
Knowledge Area: Química Inorgánica
Issue Date: 15-Sep-2015
Publisher: Elsevier
Citation: Catalysis Today. 2015, 253: 77-82. doi:10.1016/j.cattod.2014.11.037
Abstract: Ce0.64Zr0.27Nd0.09Oδ mixed oxides have been prepared by three different methods (nitrates calcination, coprecipitation and microemulsion), characterized by N2 adsorption, XRD, H2-TPR, Raman spectroscopy and XPS, and tested for soot combustion in NOx/O2. The catalyst prepared by microemulsion method is the most active one, which is related to its high surface area (147 m2/g) and low crystallite size (6 nm), and the lowest activity was obtained with the catalyst prepared by coprecipitation (74 m2/g; 9 nm). The catalyst prepared by nitrates precursors calcination is slightly less active to that prepared by microemulsion, but the synthesis procedure is very straightforward and surfactants or other chemicals are not required, being very convenient for scaling up and practical utilization. The high activity of the catalyst prepared by nitrates calcination can be attributed to the better introduction of Nd cations into the parent ceria framework than on catalysts prepared by coprecipitation and microemulsion, which promotes the creation of more oxygen vacancies.
Sponsor: The authors thank the Spanish Catalyst Society-SECAT for the grant of J.G.M. and both the Spanish Ministry of Economy and Competitiveness and the FEDER funding of UE for the financial support to the Project CTQ2012-30703.
URI: http://hdl.handle.net/10045/57888
ISSN: 0920-5861 (Print) | 1873-4308 (Online)
DOI: 10.1016/j.cattod.2014.11.037
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.cattod.2014.11.037
Appears in Collections:INV - MCMA - Artículos de Revistas

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