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How important is the (001) plane of M1 for selective oxidation of propane to acrylic acid?

MPS-Authors
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Celaya Sanfiz,  Almudena
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Hansen,  Thomas W.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Sakthivel,  Ayyamperumal
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Trunschke,  Annette
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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J.Catal258(2008)35-43.pdf
(Preprint), 570KB

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Citation

Celaya Sanfiz, A., Hansen, T. W., Sakthivel, A., Trunschke, A., Schlögl, R., Knoester, A., et al. (2008). How important is the (001) plane of M1 for selective oxidation of propane to acrylic acid? Journal of Catalysis, 258(1), 35-43. doi:10.1016/j.jcat.2008.05.028.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-FC68-D
Abstract
The role of the (001) crystallographic plane of the M1 phase of MoVTeNb mixed oxide catalysts in selective oxidation of propane to acrylic acid has been addressed by investigating a phase-pure M1 material preferentially exposing this surface. A model catalyst has been prepared by com-plete silylation of M1 followed by breakage of the SiO2 covered needles. Using this approach, the reactivity of the M1 (001) surface has been investigated by combining a micro-reactor study of propane oxidation with High-Sensitivity Low Energy Ion Scattering (HS-LEIS). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) have been used to study shape and microstructure of the model system and to verify the surface exposure of the model catalyst. The specific formation rate of acrylic acid on the model catalyst is similar to that on the phase-pure M1 reference material indicating that the (001) plane of the M1 crystal structure does not possess enhanced catalytic properties com-pared to the lateral surface of M1 needles in propane oxidation.