Catalysis Letters

, Volume 120, Issue 3–4, pp 261–273 | Cite as

Investigation of 12-Tungstophosphoric Acid Supported on Ce0.5Zr0.5O2 Solid Solution



The nature of the Keggin ions of tungstophosphoric acid interacting with Ce0.5Zr0.5O2 solid solution has been investigated. The vibrational study shows additional IR features at 1051 and 957 cm−1 which are correlated to the primary Keggin anions interacting with Lewis sites involving Ce4+ and Zr4+ ions, and thus affecting the P–O and W=Oterminal bonds. The IR study indicates the formation of interfacial Ce4+–O–W and Zr4+–O–W bonds. The chemisorbed Keggin molecular layers on Ce0.5Zr0.5O2 show activity towards conversion of acetophenone to styrene by Meerwein–Ponndorf–Verley reduction followed by dehydration. The activity is correlated with the relative intensities of IR peaks at 1051 and 957 cm−1 of the perturbed Keggin molecular layers.


Ce0.5Zr0.5O2 solid solution Tungstophosphoric acid Keggin molecular layers FTIR Styrene 



The first author would like to thank the Defence Research and Development Organization (DRDO), New Delhi, for providing financial support under Grant No. ERIP/ER/0300231/M/01.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.National Centre for Catalysis Research, Department of ChemistryIndian Institute of Technology MadrasChennaiIndia

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