Original title: Metal Nanoclusters in Zeolite Nanocages: Synthesis and Characterization by X-Ray Photoelectron Spectroscopy
Authors: Bastl, Zdeněk ; Spirovová, Ilona
Document type: Papers
Conference/Event: International Conference NANO, Brno (CZ), 2003-01-21 / 2003-10-23
Year: 2003
Language: eng
Abstract: Rhodium and palladium nanoparticles were prepared in zeolites X and Y from ion exchanged metal ammine complexes by thermal decomposition of the complexes. X-ray photoelectron spectroscopy was employed to characterize individual steps of decomposition and growth of metal nanoparticles. Substantial reduction of Pd-tetraammine complex in zeolites by X-ray irradiation leading to inward diffusion of Pd and production of highly dispersed metal has been observed. Autoreduction by heating up to 400 oC resulted in significant decrease of Rh surface concentration and less pronounced decrease of Pd surface concentration. The Pd metal autoreduction occured readily in Y zeolite yielding small nanoclusters of Pd. The shifts of the core level binding energy of metal 3d electrons observed for thermally reduced metals in zeolites were consistent with presence of highly dispersed Rh metal and/or Rh+ and indicated interaction of Pd nanoparticles with zeolite matrix.
Keywords: metal nanoclusters; photoelectron spectroscopy; x-ray
Project no.: CEZ:AV0Z4040901 (CEP)
Host item entry: International Conference NANO ''03. Proceedings

Institution: J. Heyrovsky Institute of Physical Chemistry AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0078350

Permalink: http://www.nusl.cz/ntk/nusl-26914


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Research > Institutes ASCR > J. Heyrovsky Institute of Physical Chemistry
Conference materials > Papers