Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 8, Pages 7812-7822Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b00010
Keywords
5-Hydroxymethylfurfural; 2,5-Diformylfuran; Mn-Fe oxides; Oxidation; Lattice oxygen
Categories
Funding
- National Natural Science Foundation of China [21676223, 21706223, 21776234]
- Natural Science Foundation of Fujian Province of China [2018J01017]
- Education Department of Fujian Province [JZ160398]
- Energy Development Foundation of Energy College, Xiamen University [2017NYFZ02]
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It is challenging to effectively convert 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF), a flexible biobased buildingblock, over non-noble metal catalysts. In this contribution, Mn-Fe oxides were prepared and served as highly active catalysts for the selective oxidation of HMF to DFF. Among Mn-Fe oxides with varied Mn-Fe molar ratios, Mn6Fe1Ox showed the best catalytic activity and offered HMF conversion up to 97% with a DFF selectivity of 98% (110 degrees C, 5 h, and 1.5 MPa O-2). It is revealed that the introduction of alpha-Fe2O3 resulted in significant enhancement in the amount of catalytic active sites (Mn4+-O2- pairs) and their activity in Mn6Fe1Ox for the dehydrogenation of HMF to DFF. Mn6Fe1Ox also was a robust catalyst that could be successively used at least six times without substantial loss in its catalytic activity. Furthermore, a facile two-step process for the conversion of fructose to DFF with a yield up to 80% was developed by the integration of dehydration and oxidation over Amberlyst-15 and Mn6Fe1Ox, respectively.
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