Dehydrogenation of iso-propanol on copper-containing mesoporous catalysts

BALSAMO N; CHANQUIA C; HERRERO E; CASUSCELLI S; CRIVELLO M; EIMER G

INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH

AMER CHEMICAL SOC

Lugar: Washington; Año: 2010 vol. 49 p. 1236 - 12370

0888-5885

Copper-containing mesoporous catalysts with an MCM-41 type structure have been prepared using direct hydrothermal synthesis and characterized using XRD, AAS, N2 adsorption-desorption, DRUV-vis, and TEM. All of the samples showed high structural regularity and surface area. Three copper species are presented in these materials: isolated mononuclear Cuδ+ species, oligonuclear [Cuδ+ ??? Oδ- ???Cuδ+]n clusters, and bulky CuO oxides. These materials were catalytically tested in isopropanol dehydrogenation, showing good activity and very high selectivity to propanone at 300 °C. A further reduction treatment of the samples allowed us to suggest possible active species. Both the [Cuδ+ ??? Oδ- ???Cuδ+]n clusters and the isolated Cuδ+ cations seem to be the species responsible for isopropanol dehydrogenation.