The effect of metal precursor on copper phase dispersion and nanoparticle formation for the catalytic transformations of furfural

Abstract

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Atom efficient PtCu bimetallic catalysts and ultra dilute alloys for the selective hydrogenation of furfural

“…There are selectivity differences to our previous work due to the different preparation methods for Cu/Al2O3 catalysts, although interestingly a very similar overall activity is observed at 1.5 bar H2. [8] For the alloy samples Pt38Cu62 and Pt18Cu82, the high conversion of Pt100 is mostly preserved, dropping only slightly at the lowest pressure, although on dilution to 18% Pt, the selectivity at lower pressures starts to decrease with the production of furan (similar to pure copper). It is likely that hydrogenation over these samples proceeds via a spillover pathway, whereby the hydrogen dissociates at Pt sites and spills over onto nearby copper sites, where furfural can be absorbed and hydrogenated without the need for Pt.…”

“…These catalysts were synthesized via a wet impregnation method using various copper precursors at two different loadings. [8] A high Cu loading led to the formation of well-defined nanoparticles, while a lower loading formed a highly dispersed phase consisting mostly of atomic and dimeric Cu species on Al2O3. The catalytic reaction was found to be structure sensitive, promoting decarbonylation reactions with a low Cu loading.…”

“…[7] It also has a role in the polymer industry as it can readily undergo acetalization and participate in various condensation reactions. [7,8] Moreover, it is also used as an agricultural fungicide. [6,7] Currently, the majority of furfural produced worldwide (~60 %) is hydrogenated to furfuryl alcohol (Scheme 1), [4,6] a key intermediate for the manufacture of many fine chemicals and essential industrial compounds, such as adhesives, lubricants, and corrosion resistant coatings.…”

“…The catalytic reaction was found to be structure sensitive, promoting decarbonylation reactions with a low Cu loading. [8] Previously, bimetallic catalysts (two different metals, which can either be miscible or immiscible, represented as a bulk alloy) [25] have been exploited for the hydrogenation of furfural. Some of these binary alloy systems consist of PtSn, PtGe, RhSn, NiSn, CuCo, PdCu, PdAg and PdRh.…”

Efficient single-atom Ni for catalytic transfer hydrogenation of furfural to furfuryl alcohol

“…[1][2][3][4][5] Furfural (FF), as a versatile biomass-derived platform compound, serving as a precursor to produce over 80 different industrial chemicals, owing to the presence of C=O and C=C bonds. [6][7][8][9] Furfuryl alcohol (FAL) is an important hydrogenation product of FF and it is widely used in synthetic resins, reactive solvent and production of chemicals. [10][11][12] Traditional biorefinery of FF to produce furfuryl alcohol (FAL) is constrained by high pollution and toxicity, low selectivity and high-cost etc., which made this process not economically and environmentally viable.…”