J. Phys. IV France 03 (1993) C4-197-C4-200
Ion-exchange with Pd/Pt and Fe and their reduction to metallic state in zeolites : positron annihilation and Mössbauer studiesZs. KAJCSOS1, K. LÁZÁR2 and G. BRAUER3
1 KFKI Research Institute for Particle and Nuclear Physics, P.O. Box 49, 1525 Budapest 114, Hungary
2 Institute of Isotopes, P.O. Box 77, 1525 Budapest, Hungary
3 Research Centre Rossendorf Inc., WIP Project, P.O. Box 510119, 01314 Dresden, Germany
Positron annihilation and Mössbauer-effect measurements were performed on fajausite X-, Y- and ZSM-5 zeolites in as-produced and also in ion-exchanged (with Fe and Pd or Pt) and subsequently reduced states. A correlation of the positron data with the filling-up of the cages of the zeolites due to the formation of metallic particles was found. The Mössbauer results revealed that the metallic particles are bimetallic.
© EDP Sciences 1993