Selective hydrogenation of glucose to sorbitol with tannic acid-based porous carbon sphere supported Ni–Ru bimetallic catalysts

Nano Ag/AgBr/g-C3N4 catalyzed the production of hydrogen and reduction of d-glucose to sorbitol under visible light irradiation

“…It was observed that as the catalysis increased in the presence of NaHSO 3 co-catalyst under visible light irradiation conditions, and the % conversion yield of these products was improved. [4][5][6] From the aforementioned results, it was noted that Ag/AgBr/ g-C 3 N 4 nanocomposites were effective catalysts for hydrogenation reaction under visible light conditions at a concentration of 100 ppm after 8 h under ambient conditions (Table 3, entry 9). Whereas by adding higher concentrations of nanocatalyst at 150 ppm or 200 ppm, there were no observed changes in the % conversion of sorbitol (Table 3, entries 10 and 11).…”

“…3 Recent studies have demonstrated the direct synthesis of sorbitol. [4][5][6] It was shown that high selectivity for the production of D-sorbitol was obtained when RANEY s Ni catalysts, in the presence of diols as hydrogen donors were used after 550 h. 4 In another study, the % conversion to sorbitol was 99% glucose conversion at 140 1C in 150 min reaction time when tannic acid-based porous carbon spheres supported Ni-Ru bimetallic catalysts. 5 Again, the potential effect of RANEY s nickel in the catalytic transfer hydrogenation reaction for the reduction of glucose to sorbitol proceeded at elevated temperatures (130-190 1C) after 6 h. 6 This work aims to explore an alternative reaction pathway for the transformation of glucose into sorbitol by exploring the feasibility of photocatalysis without the use of H 2 gas under pressure.…”

Designing an industrially viable bimetallic catalyst for the polyol synthesis

“…20 Although noble metal-based catalysts show good activity, because of the high cost of precious metals, the substitution of those (at least partially) with non-noble metals has become an interesting research area. Various non-noble metal-based catalysts, such as Ni/NiO (130 °C, 50 bar, conv: 95%, yield: 84%), 21 (8.33)Fe(8.33)Ni/CB (140 °C, 30 bar, conv: 70%, yield: 50%), 22 (13)Ni(2)Ru@PCS (140 °C, 30 bar, conv: 98%, yield: 98%), 23 Ni- Co -HZSM-5 (120 °C, 30 bar, conv: 100%, yield: 98%), 24 (5)Cu/SiO 2 (140 °C, 50 bar, conv: 53%, yield: 40%) and (5)Ni/Al 2 O 3 (140 °C, 30 bar, conv: 60%, yield: 50%), 25 are reported for the conversion of glucose to sorbitol. However, compared to noble metal-based catalysts, these catalysts show lower selectivity towards sorbitol formation, and active metal sintering, leaching and recycling are the problems associated with these catalysts.…”

Bimetallic NiCo/AC Catalysts with a Strong Coupling Effect for High-Efficiency Hydrogenation of N-Ethylcarbazole

“…Generally, noble metal catalysts were applied to catalyze hydrogenation reactions. Pd, , Pt, , Ru, − and so on have been widely used because of their mild reaction conditions, high catalytic activity, and selectivity. However, high cost and easy deactivation of precious metal catalysts limit their large-scale application in industrialization.…”

“…Light metals such as Fe, , Co, Ni, , and Cu , are expected to be substitutes for noble metal catalysts due to their good catalytic activity if they can be reasonably developed and utilized. At present, bimetallic nanomaterials with cheap metals added to precious metals have become the focus of research owing to the fact that the activity of this kind of catalyst is superior to that of a single metal catalyst due to the multi-component effect and synergistic effect, ,,, but the cost reduction of catalysts in the industrial process is still limited.…”