TY - JOUR
T1 - MnOx/P25 with tuned surface structures of anatase-rutile phase for aerobic oxidation of 5-hydroxymethylfurfural into 2,5-diformylfuran
AU - Chen, Lifang
AU - Yang, Wenyu
AU - Gui, Zhenyou
AU - Saravanamurugan, Shunmugavel
AU - Riisager, Anders
AU - Cao, Wenrong
AU - Qi, Zhiwen
PY - 2019
Y1 - 2019
N2 - A series of MnOx/P25 (TiO2) catalysts were prepared by a simple impregnation method and evaluated for the selective oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-diformyfuran (DFF). The as-prepared catalysts were characterized by N2 adsorption/desorption isotherms, transmission electron microscope (TEM), X-ray powder diffraction (XRD), hydrogen temperature-programmed reduction (H2-TPR), Raman, and thermogravimetric analysis. The surface anatase-rutile structure of P25 can be tuned via calcination at different temperature for different time and has significant effects on the catalytic activity of MnOx/P25 for HMF oxidation. The results reveal that MnOx supported on P25 pretreated at 600 °C for 5 h (MnOx/P25-600-5 h) shows the best catalytic performance achieving 33.2% HMF conversion along with 97.0% selectivity to DFF in a two-hour reaction time. The catalytic activity of MnOx/P25-600-5 h is almost twice higher than untreated MnOx/P25 catalyst, attributing to the optimized surface structures of anatase/rutile ratio (1.83). In addition, the effects of MnOx loadings, reaction time and temperature of the catalysts for HMF oxidation were also investigation. Furthermore, the MnOx/P25-600-5 h catalyst can be used for five consecutive runs without significant loss of its catalytic activity.
AB - A series of MnOx/P25 (TiO2) catalysts were prepared by a simple impregnation method and evaluated for the selective oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-diformyfuran (DFF). The as-prepared catalysts were characterized by N2 adsorption/desorption isotherms, transmission electron microscope (TEM), X-ray powder diffraction (XRD), hydrogen temperature-programmed reduction (H2-TPR), Raman, and thermogravimetric analysis. The surface anatase-rutile structure of P25 can be tuned via calcination at different temperature for different time and has significant effects on the catalytic activity of MnOx/P25 for HMF oxidation. The results reveal that MnOx supported on P25 pretreated at 600 °C for 5 h (MnOx/P25-600-5 h) shows the best catalytic performance achieving 33.2% HMF conversion along with 97.0% selectivity to DFF in a two-hour reaction time. The catalytic activity of MnOx/P25-600-5 h is almost twice higher than untreated MnOx/P25 catalyst, attributing to the optimized surface structures of anatase/rutile ratio (1.83). In addition, the effects of MnOx loadings, reaction time and temperature of the catalysts for HMF oxidation were also investigation. Furthermore, the MnOx/P25-600-5 h catalyst can be used for five consecutive runs without significant loss of its catalytic activity.
KW - 5-Hydroxymethylfurfural
KW - 2,5-dioformyforan
KW - Manganese oxide
KW - Titanium oxide
KW - Anatase/rutile ratio
U2 - 10.1016/j.cattod.2018.05.049
DO - 10.1016/j.cattod.2018.05.049
M3 - Journal article
VL - 319
SP - 105
EP - 112
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -