Selective 5-Hydroxymethylfurfural Hydrogenolysis to 2,5-Dimethylfuran over Bimetallic Pt-FeOx/AC Catalysts

Abstract

The selective hydrogenolysis of 5-hydroxymethylfurfural (HMF) platform molecule to 2,5-dimethylfuran (DMF) has attracted increasing attention due to its broad range of applications. However, HMF, with multiple functional groups, produces various byproducts, hindering its use on an industrial scale. Herein, a bimetallic Pt-FeOx/AC catalyst with low Pt and FeOx loadings for selective HMF hydrogenolysis to DMF was prepared by incipient wetness impregnation. The structures and properties of different catalysts were characterized by XRD, XPS, TEM, ICP-OES and Py-FTIR techniques. The addition of FeOx enhanced Pt dispersion and the Lewis acidic site density of the catalysts, and was found to be able to inhibit C=C hydrogenation, thereby im-proving DMF yield. Moreover, the presence of Pt promoted the reduction of iron oxide, creating a strong interaction between Pt and FeOx. This synergistic effect originated from the activation of the C–O bond over FeOx species followed by hydrogenolysis over the adjacent Pt, and played a critical role in hydrogenolysis of HMF to DMF, achieving a yield of 91% under optimal reaction conditions. However, the leaching of Fe species caused a metal–acid imbalance, which led to an increase in ring hydrogenation products.

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

“…The progress of WGSR is extraordinary significance and challenging. Xin et al, [179] they prepare Pt‐FeO x /AC catalyst by wetness impregnation. FeO x improves Pt distribution and the Lewis acidic points of the catalysts, the result shows that the catalyst can control hydrogenation of C=C, so the yield of DMF was high.…”

Nitrogen-doped ordered mesoporous carbon supported ruthenium metallic nanoparticles: Opportunity for efficient hydrogenolysis of biomass-derived 5-hydroxymethylfurfural to 2,5-dimethylfuran by catalytic transfer hydrogenation

“…Generally, two distinct pathways are followed for the formation of DMF from HMF ( Scheme 1 ) with hydrogenation and hydrogenolysis of alcohol and carbonyl group preceding via intermediate 5-MF or another intermediate BHMF [ 82 ]. Here, two controlled experiments were carried out using BHMF and 5-MF as reaction intermediates feedstock to corroborate our hypothesis and explore the reaction pathway over a 2%Ru–N-CMK-1 catalyst ( Table 4 ).…”

Studies on bimetallic Cu–Ag supported alumina catalysts for hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran

“…26 For instance, a bimetallic catalyst composed of Pt and Fe supported on activated carbon demonstrated enhanced Pt dispersion and Lewis acidic density, resulting in a DMF yield of 91%. 27 In a study led by Gan et al , Pt/Co single atom alloy catalysts were synthesized using a ball milling method. These catalysts were stable over five catalytic runs, offering potential for practical applications.…”