Functionalized porous materials represent an important class of nanomaterials and a research area in which fascinating developments have been achieved in the past decade. One of current major challenges in the synthesis of mesoporous materials deals with the design and controlled preparation of a suitable pore structure with ideally various functions for improved activity and selectivity in catalysis as well as high stability for a range of versatile applications [1]. SBA-15 and Mesostructured cellular foam (MCF) silicas are known to provide such structures, however they are inert in catalysis and further functionalization is generally required to achieve catalytically active materials.  The direct incorporation of metals in their structure can be achieved via isomorphic substitution of Si with Al [2]. The methods used for synthesis and stabilization of metal nanoparticles have been very diverse, ranging from standard methodologies including incipient wetness impregnation and co-precipitation to more innovative protocols such as ultrasound and microwave -assisted irradiation deposition.  In this work we present an alternative simple, fast and efficient method related to reactive milling (mechanochemistry)[3] for the preparation and stabilization of Pd nanoparticles over porous materials (SBA-15 type and MCF).  Smart bifunctional nano-molecular entities can be simply designed using this methodology which yields active materials in reactions catalyzed by both acid as well as by redox sites. These materials are envisaged to have applications in biomass conversion towards platform chemicals.[1] V. Salgueiri�o-Maceira, M. A. Correa-Duarte, Adv. Mater.2007, 19, 4131.[2] N. Linares, E. Serrano, M. Rico, A. M. Balu, E. Losada, R. Luque , J. Garc�a-Mart�nez,Chem. Commun. 2011, 47, 9024.[3] A. Pineda, A. M. Balu, J. M. Campelo, A. A. Romero, D. Carmona, F. Balas, J. Santamaria, R. Luque, ChemSusChem 2010, 4, 1561.

Efficient preparation of catalytically active bifunctional nanomaterials

247th National Meeting (2014)

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