Total oxidation of propane using CeO2 and CuO-CeO2 catalysts prepared using templates of different nature

Solsona, B. ; Sanchis, R. ; Dejoz, A. M. ; García, T. ; Ruiz-Rodríguez, L. ; López Nieto, J. M. ; Cecilia, J. A. ; Rodríguez-Castellón, E.

Resumen: Several CeO2 and CuO-CeO2 catalysts were prepared using different methods, i.e., a homogeneous precipitation with urea, a nanocasting route using CMK-3 carbon as a hard template and a sol–gel process using Poly(methyl methacrylate) (PMMA) polymer as a soft template, and tested in the total oxidation of propane. The catalysts were characterized by a number of physicochemical techniques (XRD, N2 adsorption, TPR, XPS, Raman spectroscopy) showing distinct characteristics. For each series, Cu-Ce-O catalysts with low Cu-loadings (5 wt % CuO) showed the highest activity, higher than those samples either without copper or with high Cu-loading (13 wt % CuO). The incorporation of copper leads to an increase of the concentration of bulk defects but if the Cu-loading is too high the surface area drastically falls. The highest activity in the total oxidation of propane was achieved by Cu-containing ceria catalysts synthesized using a polymer as a template, as this method yields high surface area materials. The surface area and the number of bulk/sub-surface defects of the ceria seem to be the main properties determining the catalytic activity.

Idioma: Inglés

DOI: 10.3390/catal7040096

Año: 2017

Publicado en: CATALYSTS 7, 4 (2017), 96 [14 pp.]
ISSN: 2073-4344

Factor impacto JCR: 3.465 (2017)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 55 / 146 = 0.377 (2017) - Q2 - T2

Factor impacto SCIMAGO: 0.855 - Physical and Theoretical Chemistry (Q2) - Catalysis (Q2)

Financiación: info:eu-repo/grantAgreement/ES/FEDER/CTQ2012-37925-C03-2
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2015-68951-C3-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2015-68951-C3-3-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/SEV-2012-0267

Tipo y forma: Article (Published version)