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

AuthorsSolsona, Benjamín; Sanchis, Rut; Dejoz, Ana; García Martínez, Tomás ; Ruiz-Rodríguez, Lidia; López Nieto, José Manuel; Cecilia, Juan Antonio; Rodríguez-Castellón, Enrique
Issue Date23-Mar-2017
PublisherMultidisciplinary Digital Publishing Institute
CitationCatalysts 7 (4): 96 (2017)
AbstractSeveral CeO<sub>2</sub> and CuO-CeO<sub>2</sub> 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, N<sub>2</sub> 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.
Publisher version (URL)http://doi.org/10.3390/catal7040096
Identifiersdoi: 10.3390/catal7040096
Appears in Collections:(ICB) Artículos
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