XAFS analysis of PtGe supported catalysts for dehydrogenation reactions

GERARDO F. SANTORI; FÉLIX G. REQUEJO; JOSÉ M. RAMALLO LÓPEZ; SANTIAGO J. FIGUEROA; OSMAR A. FERRETTI; MÓNICA L. CASELLA

LNLS 2005Activity Report

Brazilian Association for Synchrotron Light Technology

Lugar: Campinas; Año: 2005 p. 1 - 2

1518-0204

A great variety of industrial reactions are catalyzed by systems base on Pt-group metals, in which the activity and selectivity are modified by the addition of a second metal. The characteristics and performance of these catalysts depend strongly on the preparation methods. Because of this reason, preparation methods that lead to reproducible solids are being developed. One of these is based on the application of the surface organometallic chemistry on metals (SOMC/M). In this work we study how the addition of Ge affects the selectivity to isobutene and the overall activity on Pt catalysts. In particular we characterized both the Pt and Ge phases present in catalyst supported on SiO2 and studied the interaction between them by XAFS.