Pt/SiO2 catalyst preparation: high platinum dispersions by using low temperature treatments.

D. Radivojevic, Kulathuiyer Seshan, Leonardus Lefferts

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

3 Citations (Scopus)


A method to prepare platinum on silica catalyst using temperatures as low as possible is a goal of this study. Therefore, thermal stability in both oxidizing and reducing atmosphere of 8 different precursors was studied with thermogravimetric analyses (TGA). Based on these data, the precursors were tested to prepare silica supported catalysts, resulting in relationship between the thermal stability of the precursors, the procedures of impregnation, reduction and calcination with the final dispersion on silica. Platinum precursors decomposed more easily in reducing than in oxidizing environment, due to thermochemistry. Catalysts prepared by using ion-exchange and direct reduction in hydrogen resulted in highly dispersed platinum particles on silica. PtClx and PtOx species, when present during catalyst preparation, cause platinum sintering at temperatures higher than 250°C (PtClx) and 350°C (PtOx), respectively. These species can be converted more easily in hydrogen than in air.
Original languageUndefined
Title of host publicationStudies on Surface Science and Catalysis: Scientific Bases for the Preparation of Heterogeneous Catalysts
Place of PublicationLouvain-la-Neuve, België
Publication statusPublished - 10 Sep 2006
Event9th International Symposium: Scientific Bases for the Preparation of Heterogeneous Catalysts. - Louvain-la-Neuve, België
Duration: 10 Sep 200614 Sep 2006

Publication series

ISSN (Print)0922-3444
ISSN (Electronic)1875-6670


Conference9th International Symposium: Scientific Bases for the Preparation of Heterogeneous Catalysts.
CityLouvain-la-Neuve, België


  • Sintering
  • IR-78501
  • Dispersion
  • TGA
  • platinum precursor
  • METIS-236829
  • Pt/SiO2 catalyst

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