Direct synthesis, characterization and catalytic performance of bimetallic Fe–Mo-SBA-15 materials in selective catalytic reduction of NO with NH3

Abstract A series of bimetallic Fe–Mo-SBA-15 materials were synthesized through direct synthetic strategy and comprehensively characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 sorption, inductively coupled plasma (ICP), thermogravimetry and differential thermal analysis (TG–DTA), Fourier-transform infrared spectroscopy (FT-IR), UV–vis spectroscopy (UV–vis), temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), in situ NH 3 -adsorbed FT-IR (NH 3 -IR) and temperature-programmed desorption of NH 3 (NH 3 -TPD). The results indicated that: (1) all the samples exhibited typical hexagonal arrangement of mesoporous structure; (2) the incorporation of Fe could efficiently promote the incorporation/dispersion behavior of Mo in SBA-15; (3) the addition of Mo species could enhance the structural ordering of mesoporous materials. Moreover, the prepared materials were evaluated in the selective catalytic reduction (SCR) of NO with NH 3 . The results showed that the materials containing Fe and Mo exhibited higher catalytic activity than monometallic modified SBA-15 due to the increased intensity and quantity of surface acidity with the addition of Mo species.