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Catalysis Letters

, Volume 30, Issue 1–4, pp 31–39 | Cite as

IR characterization of sulfated zirconia derived from zirconium sulfate

  • E. Escalona Platero
  • M. Peñarroya Mentruit
Article

Abstract

Surface characterization of a sulfate-derived zirconia sample containing approximately 1 wt% S was performed by IR spectroscopy. Several types of sulfate groups were detected which are resistant to heating in vacuo up to 973 K. By using CO as a spectroscopic probe, two kinds of Lewis acid sites were identified which were assigned to surface Zr4+ ions in different environments. Comparison with corresponding data for a nearly sulfate-free zirconia sample showed that sulfated zirconia has an enhanced Lewis acidity.

Keywords

sulfated zirconia infrared spectroscopy CO adsorption 

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Copyright information

© J.C. Baltzer AG, Science Publishers 1995

Authors and Affiliations

  • E. Escalona Platero
    • 1
  • M. Peñarroya Mentruit
    • 1
  1. 1.Departamento de QuímicaUniversidad de las Islas BalearesPalmade de MallorcaSpain

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