TY - JOUR
T1 - Novel approach to rhenium oxide catalysts for selective oxidation of methanol to DMM
AU - Nikonova, Olesya
AU - Capron, Mickaël
AU - Fang, Ge
AU - Faye, Jérémy
AU - Mamede, Anne-Sophie
AU - Jalowiecki-Duhamel, Louise
AU - Dumeignil, Franck
AU - Seisenbaeva, Gulaim
PY - 2011
Y1 - 2011
N2 - Novel rhenium oxide catalysts have been prepared by impregnation of mesoporous TiO2-anatase support using amounts of homometallic, such as Re4O4(OEt)(12), and heterometallic, such as Ta4O2(OEt)(14)(ReO4)(2), rhenium alkoxide solutions with subsequent thermal treatment. The structure of the produced catalytic centers was investigated by X-ray diffraction, XPS, and IR spectroscopy in order to examine the role of Re in enhancing catalytic activity. It has been demonstrated that rhenium is mostly present as perrhenate ligands attached via an oxo-bridge to an oxide surface. The catalytic activity was studied for the selective oxidation of methanol as model reaction, revealing selectivity strongly dependent on the nature of the molecular precursor: in case of ReOx/TiO2, the catalysts are showing selectivity to formaldehyde, and in case of ReOx/Ta2O5/TiO2 to DMM in rich conditions. (C) 2011 Elsevier Inc. All rights reserved.
AB - Novel rhenium oxide catalysts have been prepared by impregnation of mesoporous TiO2-anatase support using amounts of homometallic, such as Re4O4(OEt)(12), and heterometallic, such as Ta4O2(OEt)(14)(ReO4)(2), rhenium alkoxide solutions with subsequent thermal treatment. The structure of the produced catalytic centers was investigated by X-ray diffraction, XPS, and IR spectroscopy in order to examine the role of Re in enhancing catalytic activity. It has been demonstrated that rhenium is mostly present as perrhenate ligands attached via an oxo-bridge to an oxide surface. The catalytic activity was studied for the selective oxidation of methanol as model reaction, revealing selectivity strongly dependent on the nature of the molecular precursor: in case of ReOx/TiO2, the catalysts are showing selectivity to formaldehyde, and in case of ReOx/Ta2O5/TiO2 to DMM in rich conditions. (C) 2011 Elsevier Inc. All rights reserved.
KW - Rhenium and tantalum alkoxides
KW - Catalysts
KW - Methanol Conversion
KW - DMM
KW - Rhenium and tantalum alkoxides
KW - Catalysts
KW - Methanol Conversion
KW - DMM
UR - https://res.slu.se/id/publ/33471
U2 - 10.1016/j.jcat.2011.01.028
DO - 10.1016/j.jcat.2011.01.028
M3 - Journal article
SN - 0021-9517
VL - 279
SP - 310
EP - 318
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 2
ER -