表面氧化态可调的α-MnO₂纳米线选择性催化氧化5-羟甲基糠醛

A series of α-MnO₂ nanocatalysts were synthesized by hydrothermal method for the selective catalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The results showed that the surface average oxidation state (AOS) of the catalysts was positively correlated with the activity of the catalysts, and could be regulated by oxidation/reduction calcination. After optimization, 79% HMF conversion and almost 99% DFF selectivity were achieved in 1 h over a MnO₂-NW2 catalyst with the highest AOS of Mn. And the MnO₂-NW2 catalyst can be recycle used for more than six times under a simple redox regeneration treatment.