Abstract
Catalytic oxidation of biomass derived 5-Hydroxymethylfurfural (HMF) feedstock is a promising route to produce value-added chemicals 2, 5-diformylfuran (DFF). Here, we find that incorporating monatomic Ru into the crystalline lattice of α-MnO2 can trigger synergetic catalysis for aerobic oxidation of HMF. Ru species can not only act as active sites for HMF conversion, but also activate surface oxygen species by creating rich oxygen vacancies on the α-MnO2. As result, such catalyst delivers much higher DFF productivity than that of Ru located in the tunnel of support (110 °C, 1.5 MPa, 1 h) and state-of-the-art Ru-based catalysts. Furthermore, the direct conversion of fructose into DFF was realized by combination of Amberlyst-15 and Ru-MnO2 HT catalyst in one-pot via two-step. Characterization and kinetic results indicated that atomically dispersed Ru hosted in the crystalline lattice of support created abundant oxygen vacancies and thus weakened the Mn-O bond, resulting in facile lattice oxygen activation.
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