Hydrogen-free hydrogenation of furfural to furfuryl alcohol and 2-methylfuran over Ni and Co-promoted Cu/γ-Al2O3 catalysts

Recent advances in the catalytic transfer hydrogenation of furfural to furfuryl alcohol over heterogeneous catalysts

“…In addition, the excellent catalytic performance of CuCo/Zn@NPC-600 was also related to the synergistic effect of Cu and Co. Kalong et al investigated the catalytic performance of NiCuAl and CoCuAl catalysts for the transformation of FF into FFA and 2-MF using isopropanol as the hydrogen donor. 75 Cu doping promotes the reduction of Ni and Co species and generates stronger Lewis acid sites. 50% FFA selectivity and 41.1% 2-MF selectivity were obtained in isopropanol at 473 K and 0.5 MPa N 2 over NiCuAl, while the CoCuAl catalyst gave 63% FFA selectivity and 29% 2-MF selectivity under identical reaction conditions.…”

Catalytic interplay of metal ions (Cu2+, Ni2+, and Fe2+) in MFe2O4 inverse spinel catalysts for enhancing the activity and selectivity during selective transfer hydrogenation of furfural into 2-methylfuran

“…[51][52][53] In the literature, supported monometallic and bimetallic nanoparticles catalysts have been employed to produce 2-MF from FUR via CTH. 13,28,32,[54][55][56][57][58] Among monometallic catalysts, Ru and Cu metals have been shown to selectively produce 2-MF. For example, Vlachos and coworkers reported a 68% 2-MF yield via CTH of FUR at 180 °C over the Ru/C catalyst.…”

“…Catalytic transfer hydrogenation (CTH) offers several advantages, such as the elimination of explosive H 2 gas, offering improved selectivity to 2-MF by suppressing the ring hydrogenation of FOL, and avoiding the need for highpressure inert gases during CTH reactions due to facile mixing of H-donor solvents and substrates. 14,[26][27][28] CTH can take place either via the metal hydride or Meerwein-Ponndorf-Verley (MPV) mechanism. 26 The metal hydride mechanism exploits the synergy between metal sites and Lewis acid sites, where the metal sites are involved in the dehydrogenation of H-donor molecules and the generation of active hydrogen atoms, and the Lewis acid sites activate the carbonyl groups of FUR.…”

Effect of Ni/Cu ratio on activity and selectivity of CO2 methanation over Ni‐Cu/SiO2 catalysts

“…The second peak is ascribed to the reduction of NiO to Ni 0 with smaller crystallite size and high interaction with the support 47 . When compared to pure Ni/SiO 2 samples, Cu addition lowers considerably the reduction temperatures, an effect that was attributed to the enhanced H 2 dissociation over metallic Cu, generating active H atoms which facilitates Ni reduction, known as H 2 spillover 48,50,51 …”