Heterogeneous hydrogenation of nitroaromatic compounds on gold catalysts: Influence of titanium substitution in MCM-41 mesoporous supports

CECILIA C. TORRES; JOEL B. ALDERETEA; GINA PECCHI; CRISTIAN H. CAMPOS ; PATRICIO REYES; BÁRBARA PAWELEC; ELIANA G. VASCHETTO; GRISELDA A. EIMER

APPLIED CATALYSIS A-GENERAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 517 p. 110 - 110

0926-860X

series of Ti-modified MCM-41 supports and their respective Au catalysts were prepared and characterized to study the effect of titanium into the support and on the characteristics of the Au surface speciesfor heterogeneous hydrogenation of aromatic nitrocompounds. The systems were characterized by Xray diffraction, Infrared spectroscopy (FT-IR),transmission electron microscopy (TEM), diffuse reflectance UV vis (DRUVvis), N2 adsorption desorption isotherms, ICP-MS and X-ray photoelectron spectroscopy (XPS). Additionally, these catalysts were tested for the hydrogenation of nitrobenzene in a batch-typereactor using ethanol as the solvent at 25 ◦C. Based on a combined FT-IR and DRUVvis was possible to conclude that the Ti(IV) is incorporated into the framework of MCM-41 and Ti-containing MCM-41 catalysts were more active than an MCM-41 unmodified catalyst. The Ti(X)-MCM-41 supports prepared with Ti 2.0 wt% incorporation showed the best catalytic performance, which was attributed t