The catalytic performance of mesoporous cerium oxides prepared through a nanocasting route for the total oxidation of naphthalene

Autor: Said Agouram, Benjamín Solsona, Stuart Hamilton Taylor, Tomás García, Ana M. Mastral, Begoña Puértolas, Asunción Aranda, Ramón Murillo
Přispěvatelé: Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Ministerio de Educación y Ciencia (España), European Commission
Rok vydání: 2010
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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ISSN: 0926-3373
2006-0238
DOI: 10.1016/j.apcatb.2009.10.014
Popis: Cerium oxides have been prepared by nanocasting of a mesoporous siliceous KIT-6. Through this synthesis method a partially ordered mesoporous structure, as demonstrated by several characterization techniques (N2 adsorption, XRD and HRTEM) has been obtained. Accordingly, very high surface areas have been achieved (up to 163 m2/g), despite using high calcination temperatures (550 °C). We have demonstrated that the aging temperature of the siliceous template is of outstanding importance, as this parameter is directly responsible for both the pore size and the surface area of the catalysts. In addition, whilst a low preparation temperature (40 °C) makes the further removal of the silica template difficult, higher temperatures lead to more compact frameworks with a higher interconnectivity among the networks. These cerium oxide materials have been tested as catalysts for the total oxidation of naphthalene, and display excellent activity, remarkably higher than commercial CeO2. The mesoporous ceria catalysts also demonstrate a high degree of stability with extended time-on-stream and most importantly using high reaction temperatures.
Authors wish to thank the Ministry of Science and Innovation (Spain) and to the Generalitat Valenciana through projects CTQ2006-02386 and GVPRE2008/352 for funding. S.A. wishes to thank the “Ministerio de Educacion y Ciencia” and the “Fondo Social Europeo” for its financial support.
Databáze: OpenAIRE
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