IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Magnetic properties and catalytic performance of iron-containing
Autor/es:
ELIAS, V. R.; OLIVA, M. I.; URRETA, S. E.; SILVETTI, S. P.; SAPAG,K; MUDARRA NAVARRO, A.M.; CASUSCELLI, S. G.; EIMER, G. A.
Revista:
APPLIED CATALYSIS A-GENERAL
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2009
ISSN:
0926-860X
Resumen:
The synthesis of Fe-containing mesoporous molecular sieves by the wet
impregnation method is described and the effect on the structure of a subsequent
reduction treatment, under H2 flow at 873 K is evaluated. These materials are compared
with the Si-MCM-41 host and characterized by XRD, N2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
with the Si-MCM-41 host and characterized by XRD, N2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
with the Si-MCM-41 host and characterized by XRD, N2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
with the Si-MCM-41 host and characterized by XRD, N2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
with the Si-MCM-41 host and characterized by XRD, N2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
2 flow at 873 K is evaluated. These materials are compared
with the Si-MCM-41 host and characterized by XRD, N2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
2 adsorption, AA, DRUV-vis
and Mössbauer spectroscopy. Their catalytic performance is tested in the oxidation of
cyclohexene with hydrogen peroxide and correlated with their magnetic properties. The
results show that the reduction treatment has an important effect on the selectivity to
reaction products. Thus, the reduced catalysts showed selectivity about 80% towards the
allylic oxidation products. This could be attributed to a major free radical generation
arising from the interaction between the hydrogen peroxide and the partially reduced
iron species (mainly Fe0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.
character.
character.
character.
character.
0 and Fe3O4) with superparamagnetic and/or ferromagnetic
character.