NDLI: Catalytic Oxidation of Propene over Pd Catalysts Supported on CeO2, TiO2, Al2O3 and M/Al2O3 Oxides (M = Ce, Ti, Fe, Mn)

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Catalytic Oxidation of Propene over Pd Catalysts Supported on CeO2, TiO2, Al2O3 and M/Al2O3 Oxides (M = Ce, Ti, Fe, Mn)

Content Provider	MDPI
Author	Gil, Sonia Garcia-Vargas, Jesus Liotta, Leonarda Pantaleo, Giuseppe Ousmane, Mohamed Retailleau, Laurence Giroir-Fendler, Anne
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; 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 Size	2252800
Ending Page	689
Page Count	19
Starting Page	671
File Format	PDF
e-ISSN	20734344
DOI	10.3390/catal5020671
Journal	Catalysts
Issue Number	2
Volume Number	5
Language	English
Publisher Date	2015-04-22
Access Restriction	Open
Subject Keyword	Pd-doped supported catalysts $CeO_{2}$ $TiO_{2}$ $Al_{2}O_{3}$ and $M/Al_{2}O_{3}$ oxides propene oxidation
Content Type	Text
Resource Type	Article

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