Journal article
MnOx/P25 with tuned surface structures of anatase-rutile phase for aerobic oxidation of 5-hydroxymethylfurfural into 2,5-diformylfuran
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.
Language: | English |
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Year: | 2019 |
Pages: | 105-112 |
ISSN: | 18734308 and 09205861 |
Types: | Journal article |
DOI: | 10.1016/j.cattod.2018.05.049 |
ORCIDs: | Riisager, Anders and 0000-0001-9004-8056 |
2,5-dioformyforan 5-Hydroxymethylfurfural Anatase/rutile ratio Manganese oxide Titanium oxide