Deep eutectic solvents coupled with (NH₄)₃H₆CoMo₆O₂₄trigger aerobic oxidation of 5-hydroxymethylfurfural to 5-formyl-2-furancarboxylic acid

Abstract

An Anderson-type polyoxometalate (NH4)3H6CoMo6O24 in deep eutectic solvents exhibited outstanding catalytic performance for the selective aerobic oxidation of HMF to FFCA. It is potentially a promising and highly environmentally friendly...

A dual-functional Bi-doped Co3O4 nanosheet array towards high efficiency 5-hydroxymethylfurfural oxidation and hydrogen production

“…Electrocatalytic conversion of biomass-derived chemicals to value-added products offers a promising strategy to realize green polymer chemistry. 1–4 As one of the topmost starting platform molecules, 5 5-hydroxymethylfurfural (HMF) can be oxidized into diverse products, including 2,5-diformylfuran, maleic anhydride, 5-hydroxymethyl-2-furancarboxylic acid, and 2,5-furandicarboxylic acid, etc. 3 Among them, 2,5-furandicarboxylic acid (FDCA) is attractive because it can be used as the monomer for the synthesis of poly(ethylene 2,5-furandicarboxylate) with less CO 2 emissions.…”

“…6 The US Department of Energy has listed it amongst the top 12 chemicals. 5 Currently, the oxidation of HMF to produce FDCA generally needs high temperature and pressure, organic solvents, gaseous O 2 , and heterogeneous catalysts, 7,8 making this process less economical along with the formation of by-products. In such circumstances, a more efficient synthetic route is still being explored.…”

Aerobic Oxidation of 5‐Hydroxymethylfurfural via Hydrogen Bonds Reconstruction with Ternary Deep Eutectic Solvents

“…In Figure 3A, the peak at 922 cm −1 is ascribed to the symmetric telescoping vibration of terminal M=O in IMo 6 catalyst [37,38] . After being treated with DESs, the peak shifted to 903 cm −1 , suggesting an electron‐donating behavior might happen from DESs to POM [25] . In the following, X‐ray photoelectron spectroscopy (XPS) was utilized to further study the chemical state of Mo in POM and the DESs‐treated POM samples.…”

“…The utilization of binary DESs for the catalytic oxidation of HMF has proved its effectiveness. However, the elucidation of the underlying reaction mechanism still demands unwavering dedication from researchers to achieve unparalleled refinement [25] …”

Recent Progress in Metal‐Catalyzed Selective Oxidation of 5‐Hydroxymethylfurfural into Furan‐Based Value‐Added Chemicals

“…It was also found that increasing the O 2 pressure and the concentration of NaOH was conducive to the selective formation of FFCA. In a later report, Sun et al [167] developed an Anderson-type polyoxometalate (NH 4 ) 3 H 6 CoMo 6 O 24 and deep eutectic solvents (DESs), which showed excellent HMF oxidation performance. The DESs could break the initial hydrogen bonds and promote the formation of new hydrogen bonds.…”