Non Noble-Metal Copper–Cobalt Bimetallic Catalyst for Efficient Catalysis of the Hydrogenolysis of 5-Hydroxymethylfurfural to 2,5-Dimethylfuran under Mild Conditions

Abstract

The efficient catalysis of the hydrogenation of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) over non noble-metal catalysts has received great attention in recent years. However, the reaction usually requires harsh conditions, such as high reaction temperature and excessively long reaction time, which limits the application of the non noble-metal catalysts. In this work, a bimetallic Co x -Cu@C catalyst was prepared via the pyrolysis of MOFs, and an 85% DMF yield was achieved under a reaction temperature and time of 160 °C and 3 h, respectively. The results of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDX) mapping, and other characterization techniques showed that the synthesis method in this paper realized the in situ loading of cobalt into the copper catalyst. The reaction mechanism studies revealed that the cobalt doping effectively enhanced the hydrogenation activity of the copper-based catalyst on the C–O bond at a low temperature. Moreover, the bimetallic Co x -Cu@C catalyst exhibited superior reusability without any loss in the activity when subjected to five testing rounds.

Progress in Selective Conversion of 5‐Hydroxymethylfurfural to DHMF and DMF

“…They use NaBH 4 as the H‐donor and get a close quantitative selectivity of DHMF in ChCl‐glycerol DES at 25 °C in 3 h. DES is a new type of green solvent, in which HMF/BHMF could be controlled by the powerful hydrogen bonding interaction, ChCl is chosen as HBA (hydrogen‐bonding acceptor), ethylene glycol or glycerol is used as HBD (hydrogen‐bonding donor). Zhang et al, [73] they make a 10 %Ni/HC (hydrothermal carbon) catalyst, it refines from sucrose by the hydrothermal method, the dispersion and anchoring of Ni are promoted. The catalyst also has a mass of particular surface area and a number of groups with oxygen‐containing.…”

“…The reactions include hydrogenation, oxidation, biocatalysis, etherification, amination, condensation, electrolysis and halogenation etc. [66][67][68][69] HMF can prepare a wide range of compounds by catalytic hydrogenation to produce, for instance, the selective catalytic reactions of HMF produce 2, 5dimethylfuran (DMF), [70][71][72][73][74] 2, 5-dihydroxymethylfuran (DHMF), [75][76][77][78][79] 2, 5-dihydroxymethyltetrahydrofuran(DHMTHF), [80][81][82][83][84] 2, 5-dimethyltetrahydrofuran (DMTHF), [85][86][87][88][89] 5-methyfurfural (5-MF), [90][91] 2, 5-hexanedione (HD), [92][93][94] 1-hydroxyhexane-2, 5-dione (HHD), [95][96][97][98][99][100] 1, 2, 5hexanetriol (1, 2, 5-HT), [101] 1, 2, 6-hexanetriol (HTO), [102][103][104][105][106] 1, 6hexanediol (HDO), [107][108][109][110]…”

Recycling spent batteries to green innovation: a CuCo-based composite as an electrocatalyst for CO2 reduction

“…4b). 35 These signals were deconvoluted into two components each and were verified as a signal assigned to Co 2+ and the satellite of Co oxide species. The difference in Co 2+ between the 2p 3/2 (780.4 eV) and 2p 1/2 (796.05 eV) signals reaches 15.64 eV (Fig.…”

Advanced Carbon‐Based Nanocatalysts and their Application in Catalytic Conversion of Renewable Platform Molecules

“…In many catalytic reactions, internal active species would directly affect the catalytic performance of carbon‐encapsulated metal catalysts [128,129,132,133,137–145,149] . Zhao and co‐workers prepared Co nanoparticles (NPs) with Co−N x active sites confined by nitrogen‐doped carbon nanotubes through pyrolyzing ZIF‐67 [128] .…”

“…In many catalytic reactions, internal active species would directly affect the catalytic performance of carbon-encapsulated metal catalysts. [128,129,132,133,[137][138][139][140][141][142][143][144][145]149] Zhao and co-workers pre-pared Co nanoparticles (NPs) with CoÀ N x active sites confined by nitrogen-doped carbon nanotubes through pyrolyzing ZIF-67. [128] Cobalt-based catalysts (Co@N-CNTs) with different active sites could be obtained by changing the pyrolysis temperature (Figure 12a).…”