Journal
CHEMPLUSCHEM
Volume 86, Issue 7, Pages 997-1005Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.202100199
Keywords
2; 5-diformylfuran; heterogeneous catalysis; hydroxyapatite; 5-hydroxymethylfurfural; polyoxometalate
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The catalyst NH4)(5)H6PV8Mo4O40 supported on hydroxyapatite showed efficient catalytic activity for the oxidative conversion of 5-hydroxymethylfurfural to 2,5-diformylfuran. It can also be reused for at least six times with high stability and duration, making it a promising catalyst for cost-saving one-step reactions.
(NH4)(5)H6PV8Mo4O40 supported on hydroxyapatite (HAP) (PMo4V8/HAP (n)) was prepared through the ion exchange of hydroxy groups. This ion exchange favored the oxidative conversion of 5-hydroxymethylfurfural (5-HMF) to 2,5-diformylfuran (DFF) in a one-pot cascade reaction with 96.0 % conversion and 83.8 % yield under 10 mL/min of O-2 flow. PMo4V8/HAP (31) was used to explore the production of DFF directly from glucose with the highest yield of 47.9 % so far under atmospheric oxygen, whereas the yield of DFF increased to 54.7 % in a one-pot and two-step reaction. These results indicated that the active sites in PMo4V8/HAP (31) retained their activities without any interference toward one another, which enabled the production of DFF in a more cost-saving way by only using oxygen and one catalyst in a one-step reaction. Meanwhile, the rigid structure of HAP and strong interaction in PMo4V8/HAP (31) allowed this catalyst to be reused for at least six times with high stability and duration.
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