Nanoporous and Highly Active Silicon Carbide Supported CeO2‐Catalysts for the Methane Oxidation Reaction. Issue 2 (8th August 2013)

• Record Type: Journal Article
• Authors: Hoffmann, Claudia; Biemelt, Tim; Lohe, Martin R.; Rümmeli, Mark H.; Kaskel, Stefan
• Is Part Of: Small. Volume 10:Issue 2(2014:Jan.)
• Page Start: 316
• Page End: 322
• Publication Date: 2013-08-08
• Subjects: Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201300906
• Languages: English
• ISSNs: 1613-6810

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>CeO_x@SiO₂ nanoparticles are used for the first time for the generation of porous SiC materials with tailored pore diameter in the mesopore range containing encapsulated and catalytically active CeO₂ nanoparticles. The nanocasting approach with a preceramic polymer and subsequent pyrolysis is performed at 1300 °C, selective leaching of the siliceous part results in CeO_x/SiC catalysts with remarkable characteristics like monodisperse, spherical pores and specific surface areas of up to 438 m²·g⁻¹. Porous SiC materials are promising supports for high temperature applications. The catalysts show excellent activities in the oxidation of methane with onset temperatures of the reaction 270 K below the onset of the homogeneous reaction. The synthesis scheme using core‐shell particles is suited to functionalize silicon carbide with a high degree of stabilization of the active nanoparticles against sintering in the core of the template even at pyrolysis temperatures of 1300 °C rendering the novel synthesis principle as an attractive approach for a wide range of catalytic reactions.</p> </abstract>