Abstract
The ordered mesoporous Al2O3-CeO2 composite materials with different Ce/Al molar ratios were synthesized by the solvent evaporation-induced self-assembly method, and bimetallic CuMn catalysts were prepared for furfural hydrogenation. The characterization results proved that Ce incorporation not only improved dispersion of CuMn alloys and regulated metal nanoparticles, but also increased the amount of Ov and acid sites of bimetallic CuMn catalysts. Combining with DFT calculation, it could be deduced that the dispersed Cu sites enhanced the adsorption and activation of H2, while dispersed CuMn sites promoted the adsorption of furfural molecules. This synergetic adsorption mechanism enabled the CuMn/AlCe0.02 catalyst to exhibit the highest conversion (> 99.9 %) and selectivity (99.0 %) under reaction conditions of 140 °C, 1.5 MPa H2 and 2.5 h. Furthermore, the CuMn/AlCe0.02 catalyst exhibited the stable catalytic activity for five recycles and outstanding universality for different biomass platform derivatives.
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