Catalysis Letters

, Volume 71, Issue 3–4, pp 163–167 | Cite as

Effect of multivalent cations on agglomeration of Ru clusters supported on Y zeolite

  • Sung June Cho
  • Jae Eui Yie
  • Ryong Ryoo


The effect of multivalent cations, Ca2+, Ba2+, Y3+, Ce3+ and La3+ on the agglomeration of Ru clusters on NaY zeolite under oxygen and at high temperature has been investigated with 129Xe NMR spectroscopy and X-ray absorption fine structure. Multivalent metal cations exchanged into the zeolite suppress neither the migration nor agglomeration of small Ru clusters inside the supercage of NaY zeolite into large metal particles onto the external surface of NaY zeolite under 1 atm oxygen above 520 K. However, the resultant Ru particle size depends on the type of metal cations exchanged into NaY zeolite.

Ru catalyst 129Xe NMR EXAFS XANES NaY zeolite metal cluster sintering 


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Copyright information

© Plenum Publishing Corporation 2001

Authors and Affiliations

  • Sung June Cho
    • 1
  • Jae Eui Yie
    • 2
  • Ryong Ryoo
    • 1
  1. 1.Materials Chemistry Laboratory (School of Molecular Science, BK-21)Korea Advanced Institute of Science and TechnologyTaejonKorea
  2. 2.Division of Chemical Engineering and BiotechnologyAjou UniversitySuwonKorea

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