NDLI: Catalytic Oxidation of Propene over Pd Catalysts Supported on CeO 2 , TiO 2 , Al 2 O 3 and M / Al 2 O 3 Oxides ( M = Ce , Ti , Fe , Mn )

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Catalytic Oxidation of Propene over Pd Catalysts Supported on CeO 2 , TiO 2 , Al 2 O 3 and M / Al 2 O 3 Oxides ( M = Ce , Ti , Fe , Mn )

Content Provider	Semantic Scholar
Author	Gil, Sonia Fraile García-Vargas, Jesús M. Liotta, Leonarda Francesca Pantaleo, Giuseppe Ousmane, Mohamed Retailleau, Laurence Giroir-Fendler, Anne
Copyright Year	2015
Abstract	In the following work, the catalytic behavior of Pd catalysts prepared using different oxides as support (Al2O3, CeO2 and TiO2) in the catalytic combustion of propene, in low concentration in excess of oxygen, to mimic the conditions of catalytic decomposition of a volatile organic compound of hydrocarbon-type is reported. In addition, the influence of different promoters (Ce, Ti, Fe and Mn) when added to a Pd/Al2O3 catalyst was analyzed. Catalysts were prepared by the impregnation method and were characterized by ICP-OES, N2 adsorption, temperature-programmed reduction, temperature-programmed oxidation, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. Catalyst prepared using CeO2 as the support was less easily reducible, due to the stabilization effect of CeO2 over the palladium oxides. Small PdO particles and, therefore, high Pd dispersion were observed for all of the catalysts, as confirmed by XRD and TEM. The addition of Ce to the Pd/Al2O3 catalysts increased the metal-support interaction and the formation of highly-dispersed Pd species. The addition of Ce and Fe improved the catalytic behavior of the Pd/Al2O3 catalyst; OPEN ACCESS Catalysts 2015, 5 672 however, the addition of Mn and Ti decreased the catalytic activity in the propene oxidation. Pd/TiO2 showed the highest catalytic activity, probably due to the high capacity of this catalyst to reoxidize Pd into PdO, as has been found in the temperature-programmed oxidation (TPO) experiments.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.mdpi.com/2073-4344/5/2/671/pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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