Aluminovanadate oxynitride catalyst: proposition for the basic site
Article Abstract:
Issues concerning the basic sites of an aluminovanadate oxynitride catalyst which is active in the Knoevenagel condensation reaction between benzaldehyde and malononitrile are presented.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Influence of the impregnation pH on the surface characteristics and the catalytic activity of the Mo/lambda-Al2O3 and CoMo/gama-Al2O3 hydrodesulfurization catalysts prepared by equilibrium deposition filtration (EDF)
Article Abstract:
Two unprompted Mo/lambda-Al2O3 catalysts containing almost the same amount of Mo were prepared using equilibrium deposition filtration, EDF, for depositing Mo-oxo species on the alumina surface at two different pH values (3.9 and 6.3). The characterization of specimens showed that the Mo deposition at pH = 3.9 favors the deposition of polymeric Mo-oxo species, in agreement with predictions drawn on the basis of two models related with the acid-base behavior of the gama-Al2O3 surface.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
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DRIFTS study of the surface structure and nitridation process of mixed galloaluminophosphate oxynitride (AlGaPON) catalysts
Article Abstract:
High surface amorphous oxynitrides AlPON and AlGaPON with similar O/N ration were compared with the spectra of high surface area amorphous oxide AlPO, AlGaPO and GaPO and with that of the nitride GaN. This enable a correct assignation of the bands in their IR vibrational spectra, especially solids named galloaluminophosphate oxynitride, AlGaPON. A shift of the framework band vibrations due to a second-neighbor effect was induced by the substitution of aluminum atoms by gallium.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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