Journal of Materials Science

, Volume 42, Issue 15, pp 6074–6086 | Cite as

Spectroscopic characterization of tungstated zirconia prepared by equilibrium adsorption from hydrogen peroxide solutions of tungsten(VI) precursors

  • Margarita KantchevaEmail author
  • Cevryie Koz


Two series of WOx/ZrO2 samples are prepared by equilibrium adsorption from H2O2 solutions at pH 1.8 containing two different precursor anions, [W2O3(O2)4(H2O)2]2− and [H2W12O40]6−. The starting material is amorphous zirconium oxyhydroxide. The maximum W densities obtained are larger than that reported in the literature for systems synthesized by the same method using aqueous non-peroxide solutions. In the case of the metatungstate precursor, this increase is attributed to the generation of additional anchoring sites by interaction between the amorphous support and H2O2. The high uptake achieved when the peroxo complex is used as a precursor is a result of both the ZrOx(OH)4-2x–H2O2 interaction and low nuclearity of the adsorbing anion. The materials are characterized by XRD, DR–UV–vis, Micro-Raman and FT-IR spectroscopy. The surface acidities of samples with identical W loading prepared by equilibrium adsorption from the [H2W12O40]6−–H2O2 system and by impregnation with aqueous solution of ammonium metatungstate are investigated by FT-IR spectroscopy of CO adsorbed at 80 K.


Zirconia Raman Spectrum Acid Site Equilibrium Adsorption Selective Catalytic Reduction 



This work was financially supported by Bilkent University and the Scientific and Technical Research Council of Turkey (TÜBITAK), Projects 106T081 and 105M094.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Laboratory for Advanced Functional materials, Department of ChemistryBilkent UniversityBilkent, AnkaraTurkey

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