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Imaging of low temperature induced SMSI on Pd/TiO2 catalysts

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Abstract

Pd/TiO2 catalysts were found to enter an strong metal support interaction (SMSI) state after reduction at temperatures as low as 473 K. This was identified as a significant loss in the CO uptake as monitored by low temperature FTIR. Electron microscopy provides direct evidence of the presence of ordered, reduced titanium oxide layers over palladium (SMSI state) for Pd/TiO2 catalysts following reduction at temperature 623 K. The crystal phase was identified as Ti4O7 and this phase, once formed, was found to be stable even after exposure to atmospheric conditions.

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Acknowledgments

We would like to thank the financial support from the School of Engineering & Physical Sciences of the University of Aberdeen, Fundação para a Ciência e a Tecnologia (FCT) Portugal and the Society of Chemical Industry (SCI).

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Authors and Affiliations

  1. Surface Chemistry and Catalysis Group, Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen, AB24 3UE, UK

    Jacinto Sá & James A. Anderson

  2. University Service Centre for Transmission Electron Microscopy, Vienna University of Technology, 8-10/052, A-1040, Vienna, Austria

    Johannes Bernardi

Authors
  1. Jacinto Sá
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  2. Johannes Bernardi
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  3. James A. Anderson
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Correspondence to James A. Anderson.

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Sá, J., Bernardi, J. & Anderson, J.A. Imaging of low temperature induced SMSI on Pd/TiO2 catalysts. Catal Lett 114, 91–95 (2007). https://doi.org/10.1007/s10562-007-9049-1

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  • DOI: https://doi.org/10.1007/s10562-007-9049-1

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