6032.1:
Plasma and Vacuum-UV Techniques Designed for Nanoparticles Deposition on Industrial Catalysts with Increased Dispersion/Activity/Selectivity
Abstract
This feasibility project aims to close an important gap in the use of physical techniques of supported Pd and Pt nanoscale clusters or combinations on silica and C-fabrics by plasma and vacuum UV (V-UV) techniques. The initial surface treatment by plasma and V-UV aims at introducing: carboxylic, peroxides, percarboxylic, sulfonic, phosphonate and hydroxamate groups on silica and C-fabrics to increase the dispersion of Pd and Pt leading to an increased activity and selectivity of the supported catalysts. RF-plasma and microwave plasma as well 185 nm Hg V-UV sources available in the EPFL laboratory will be used to introduce the initial anchoring chelating group(s) on the fabrics surface from the appropriate gas atmosphere followed by known deposition techniques for Pt and Pd on supports. The testing of this innovative materials will be carried out by ADVACAT for CO oxidation and denitrification processes on Pd/Pt-silica fabrics and for the hydrogenation of polyalcohols containing triple bonds on Pd/C-fabrics.