Cluster-derived Ir-Sn/SiO2 catalysts for the catalytic dehydrogenation of propane: A spectroscopic study
Dal Santo, Vladimiro
Pergola, Roberto Della
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AbstractIr-Sn bimetallic silica-based materials have been prepared via deposition of the molecular organometallic clusters (NEt4)2[Ir 4(CO)10(SnCl3)2] and NEt 4[Ir6(CO)15(SnCl3)] or via deposition of Sn organometallic precursor Sn(n-C4H9) 4 onto pre-formed Ir metal particles. These solids possess promising properties, in terms of selectivity, as catalysts for propane dehydrogenation to propene. Detailed CO-adsorption DRIFTS, XANES and EXAFS characterization studies have been performed on these systems in order to compare the structural and electronic evolution of systems in relation to the nature of the Ir-Sn bonds present in the precursor compounds and to propose a structural model of the Ir-Sn species present at the silica surface of the final catalyst. © 2013 The Royal Society of Chemistry.
SponsorsThe SOLEIL synchrotron light laboratory in Saclay (Paris, France) and the staff of the SAMBA beamline are gratefully acknowledged for the support and technical assistance. The Xray absorption experiments were performed with the approval of the Photon Factory Proposal Review Committee (No. 2005G221) and the SPring-8 Program Review Committee (2004A0122-NXa300-np and 2003B0386-NXa-np). R. P., M. G. and V. D. S. thank the Italian Ministry of Education, University and Research through the Project "ItalNanoNet" (Rete Nazionale di Ricerca sulle Nanoscienze; Prot. No. RBPR05JH2P).
PublisherRoyal Society of Chemistry