MOF-Derived Cu-Nanoparticle Embedded in Porous Carbon for the Efficient Hydrogenation of Nitroaromatic Compounds

Ambient‐Temperature Reductive Amination of 5‐Hydroxymethylfurfural Over Al2O3‐Supported Carbon‐Doped Nickel Catalyst

“…When the pyrolysis-reduction temperature was increased to 400 °C, the sample Ni@C/Al 2 O 3 -400 presented three additional diffraction peaks at 44.5, 51.8, and 76.4°, assignable to Ni (111), Ni (200), and Ni (220) lattice planes, [43,44] respectively. Meanwhile, Ni@C/ Al 2 O 3 -500 obtained with higher pyrolysis-reduction temperature displayed the narrow characteristic peaks to metallic nickel, indicating the aggregation of Ni particles, [45] in line with the result of transmission electron microscopy (TEM) images (Figure S1). In contrast, Ni@C/Al 2 O 3 -400 with the morphology of irregular aggregation in μm level (Figure 2a) presented a homogeneous dispersion of nickel particles, which is revealed by TEM images and corresponding elemental imaging (Figure 2b,c).…”

Copper oxides supported sulfur-doped porous carbon material as a remarkable catalyst for reduction of aromatic nitro compounds

“…Among the examined solvents (entries 8, 9, 10, and 11), the best conversion is obtained in the presence of H 2 O (entry 6, 100% conversion). According to a literature review, the presence of water molecules has a significant impact on the conversion of 4-nitro aniline to 1,4-diaminobenzene 50 . The reducing agent screening and its amount show that NaBH 4 is present for the optimal conversion (entry 6).…”

“… Entry Catalyst Reaction conditions Time (h) Yield (%) Refs. 1 Cu x O@CS-400 7 mg 4-Nitro aniline (1 mmol), NaBH 4 (2 mmol), H 2 O (3 mL), 55 °C 20 min 100 This article 2 Cu@C-400 15 mg Nitrobenzene (2 mmol), EtOH (10 mL), NaBH 4 (4 mmol, added in two times), 45 °C 30 min 100 50 3 Cu/Cu 2 O/C 0.04 mg 4-Nitrophenol (5 × 10 –3 M), NaBH 4 (0.2 M), H 2 O (2 mL), RT 2.67 min 99 51 4 Cu/Cu 2 O@C 10 mg 4-Nitroaniline, NaBH 4 (0.1M), H 2 O, RT 1 100 52 5 Cu/Cu2O@C-rGO 1 mg 4-Nitrophenol (0.3 × 10 –3 mmol), NaBH 4 (0.25 mmol), H 2 O (2 mL), RT 90 98 53 6 a-Cu@C 5 mol % Nitrobenzene (1 mmol), THF/H 2 O (1:2. 3 mL), NaBH 4 (3 mmol), 50 °C 4 98 54 …”

Precisely Tailoring Selectivity via Target Group's Steered Adsorption on Cu2O/Tantalate Catalysts for Hydrogenation of 3‐Nitrostyrene

“…[35] It has been reported Cu/WO 2.72 , CuNi/Graphene, Sm 2 Co 17 /Cu and Cu nanoparticle/carbon showed excellent conversion activity for series of nitroaniline. [36][37][38] T. Pal and co-workers demonstrated Cu 2 O and Cu 0 NPs were all efficient for the hydrogenation of nitroaromatic compounds, even higher than several noble metal catalysts. [39,40] Nevertheless, for these copper-based catalysts, the pure target functional product derived from the substrate with more reducible groups has been difficultly acquired because of its uncontrollably strong catalytic activity.…”

“…Among these 3d transition metals, copper's abundance on the Earth and its considerably lower price have attracted more and more attention for −NO 2 reductions due to its potential as alternatives of the rare and expensive noble‐metal catalysts [35] . It has been reported Cu/WO 2.72 , CuNi/Graphene, Sm 2 Co 17 /Cu and Cu nanoparticle/carbon showed excellent conversion activity for series of nitroaniline [36–38] . T. Pal and co‐workers demonstrated Cu 2 O and Cu 0 NPs were all efficient for the hydrogenation of nitroaromatic compounds, even higher than several noble metal catalysts [39,40] .…”