Metal Palladium Dispersed Inside Macroporous Ion-Exchange Resins: Textural Characterization and Accessibility to Gaseou Reactants

0166678 - UCHP-M 20020264 RIV NL eng J - Journal Article
Biffis, A. - Jeřábek, Karel - D'Archivio, A. A. - Galantini, L. - Corain, B.
Metal Palladium Dispersed Inside Macroporous Ion-Exchange Resins: Textural Characterization and Accessibility to Gaseou Reactants.
Studies in Surface Science and Catalysis. Roč. 130, - (2000), s. 2327-2332. ISSN 0167-2991.
[International Congress on Catalysis /12./. Granada, 09.07.2000-14.07.2000]
Institutional research plan: CEZ:AV0Z4072921
Keywords : metal palladium * dispersed * ion-exchange resins
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 0.513, year: 2000

Commercial macroporous ion-exchange resins were used to support Pd metal by a two step ion-exchange and reduction procedure. The textural features of the resins under solid-liquid conditions were determined by means of ISEC, ESR nad PGSE-NMR measurements. TEM characterization of the obtained Pd/rwesin composite showed the presence of uniformly sized Pd crystallites located at the macropore "surface". Pulse chemisorption analysis gave evidence for the lack of accessibility of the crystallites when the resin composite is in the dry state, thus suggesting that the metal particles are in fact embedded in a dry gel-type resin layer at the "surfaceů of the macropores and therefore practically unaccessible to the molecules of a gaseous phase.
Permanent Link: http://hdl.handle.net/11104/0063793