Catalysis Letters

, Volume 141, Issue 3, pp 400–407 | Cite as

Influence of Milling Media on the Physicochemicals and Catalytic Properties of Mechanochemical Treated Vanadium Phosphate Catalysts

  • Y. H. Taufiq-YapEmail author
  • C. K. Goh
  • G. J. Hutchings
  • N. Dummer
  • J. K. Bartley


VOHPO4·0.5H2O synthesized via the alcohol reduction of VOPO4·2H2O was mechanochemical treated for 30 min in three different media, i.e. cyclohexane, ethanol and air. XRD results revealed that their structure became less crystalline compared to the unmilled material. SEM showed that the particles for the milled materials become smaller and unique features were observed in the different type of media used. The reactivity of the oxygen species linked to V5+ and V4+ were also affected by the milling process. The selectivity to maleic anhydride from n-butane oxidation were observed to increase in line with the increase in the oxygen species associated with V5+ and the presence of isolated V5+ phase. A correlation was observed between the crystallite size of the pyrophosphate phase at (020) plane with the maleic anhydride selectivity.

Graphical Abstract


Mechanochemical Vanadium phosphate Maleic anhydride n-butane oxidation 



Financial assistance from Malaysian Ministry of Science, Technology and Innovation is gratefully acknowledged. The Cardiff research team thanks the EPRSC for financial support.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Y. H. Taufiq-Yap
    • 1
    • 2
    Email author
  • C. K. Goh
    • 1
  • G. J. Hutchings
    • 3
  • N. Dummer
    • 3
  • J. K. Bartley
    • 3
  1. 1.Centre of Excellence for Catalysis Science and TechnologyUniversiti Putra MalaysiaSelangorMalaysia
  2. 2.Department of Chemistry, Faculty of ScienceUniversiti Putra MalaysiaSelangorMalaysia
  3. 3.Cardiff Catalysis Institute, School of ChemistryCardiff UniversityCardiffUK

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