Structural rearrangement and catalytic properties of the Wells-Dawson (NH4)6P2Mo18O62 heteropolycompound in the 2-butanol reaction
(2009) Applied Catalysis A: General — Vol. 357, n° 2, p. 115-124 (2009)
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- Structural changes of the ammonium phospho-molybdic Wells-Dawson salt (NH4)(6)P2Mo18O62 were examined by several solid state techniques during the oxygen-assisted catalytic reaction of 2-butanol. A significant evolution of the catalytic behavior occurs while the working catalyst is in the course of its reorganisation to a Keggin structure. Precisely, a particular species formed in situ and presenting intermediate characteristics between those of Wells-Dawson and Keggin structures exerts a beneficial effect on the selectivity to methyl-ethyl-ketone. This high selectivity towards the oxidative dehydrogenation was however found to be ephemeral and the selectivity decline was correlated to a no proper stabilization of this most active intermediate. (C) 2008 Elsevier B.V. All rights reserved.
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Arendt, E., Mc Evoy, K., & Gaigneaux, E. (2009). Structural rearrangement and catalytic properties of the Wells-Dawson (NH4)6P2Mo18O62 heteropolycompound in the 2-butanol reaction. Applied Catalysis A: General, 357(2), 115-124. https://doi.org/10.1016/j.apcata.2008.12.002 (Original work published 2009)