Palladium supported on magnesium hydroxyl fluoride: an effective acid catalyst for the hydrogenation of imines and N-heterocycles

Kokane, Reshma; Corre, Yann; Kemnitz, Erhard; Dongare, Mohan K.; Agbossou‐Niedercorn, Francine; Michon, Christophe; Umbarkar, Shubhangi B.

doi:10.1039/d1nj03760a

Cited by 8 publications

(3 citation statements)

References 95 publications

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“…These diffraction peaks were sharp and predominant in the case of Mg(OH) 2 -20% F, then their intensity decreased gradually with increasing ( x ) % F added to Mg(OH) 2 , see Figure a. On the other hand, a group of diffraction peaks associated with the formation of tetragonal MgF 2 (ICCD file: 6-0290) in these mixtures ,− was recorded along with the crystallographic planes (110), (101), (111), (201), (211), and (220), which correspond to the Bragg reflections at 2θ values of 27.265, 35.174, 40.405, 43.613, 53.468, and 56.149°, respectively. The sharpness and intensity of these diffractions increased steadily from Mg(OH) 2 -20% F up to Mg(OH) 2 -50% F due to the formation of further MgF 2 in these nanocomposite mixed samples.…”

Section: Resultsmentioning

confidence: 89%

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO₂ at Different Temperatures under Ambient Pressure

et al. 2022

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The utilization of Mg−O−F prepared from Mg(OH) 2 mixed with different wt % of F in the form of (NH 4 F•HF), calcined at 400 and 500 °C, for efficient capture of CO 2 is studied herein in a dynamic mode. Two different temperatures were applied using a slow rate of 20 mL•min −1 (100%) of CO 2 passing through each sample for only 1 h. Using the thermogravimetry (TG)-temperature-programed desorption (TPD) technique, the captured amounts of CO 2 at 5 °C were determined to be in the range of (39.6−103.9) and (28.9−82.1) mg COd 2 •g −1 for samples of Mg(OH) 2 mixed with 20−50% F and calcined at 400 and 500 °C, respectively, whereas, at 30 °C, the capacity of CO 2 captured is slightly decreased to be in the range of (32.2−89.4) and (20.9− 55.5) mg COd 2 •g −1 , respectively. The thermal decomposition of all prepared mixtures herein was examined by TG analysis. The obtained samples calcined at 400 and 500 °C were characterized by X-ray diffraction and surface area and porosity measurements. The total number of surface basic sites and their distribution over all samples was demonstrated using TG-and differential scanning calorimetry-TPD techniques using pyrrole as a probe molecule. Values of (ΔH) enthalpy changes corresponding to the desorption steps of CO 2 were calculated for the most active adsorbent in this study, that is, Mg(OH) 2 + 20% F, at 400 and 500 °C. This study's findings will inspire the simple preparation and economical design of nanocomposite CO 2 sorbents for climate change mitigation under ambient conditions.

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Section: Resultsmentioning

confidence: 89%

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO₂ at Different Temperatures under Ambient Pressure

et al. 2022

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“…The heterogeneous catalytic hydrogenation of pyridine and derivatives of it is mainly done using catalysts based on noble metals [31]. Catalysts based on ruthenium (2.5 wt %) on a nitrogen-doped mesoporous carbon support were studied in [32] for the hydrogenation of quinoline at 40°C and 10 atm H 2 .…”

Section: Introductionmentioning

confidence: 99%

Selective Hydrogenation of Pyridine and Derivatives of It on Bimetallic Catalysts

Kustov

Дунаев²,

Salmi³

2022

Russ. J. Phys. Chem.

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A study is performed of the catalytic properties of bimetallic nanoparticles based on palladium and a base metal (silver or copper) in the selective hydrogenation of pyridine and derivatives of it with the formation of piperidine and derivatives of it. It is established that the effect of increasing the activity of bimetallic nanoparticles is associated with the small size of particles (2–3 nm), relative to monometallic palladium catalyst. The conversion of pyridine reaches 99% with a piperidine selectivity of 99% under mild conditions (60°C, pressure H2 = 70 atm).

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“…Compared with the complex cyclization reaction, the method of directly converting nitrogen‐containing heterocycles into 1,2,3,4‐tetrahydroquinoline is more convenient and efficient. The method of straightforward reduction hydrogenation of quinoline derivatives is one of the most studied and reported strategies, including the reduction of quinoline catalyzed by Pd, [8a] Rh, [8b] Co, [8c] Raney Ni, [8d] PtO 2 [8e] and 3,4‐dihydroquinolin‐2(1H)‐one catalyzed by Ru, [9a] BH 3 , [9b] B(C 6 F 5 ) 3 , [9c] DIBAL [9d] and samarium powder, [9e] these reactions require high‐pressure hydrogen, and some reducing agents are explosive, which limits their application. Therefore, a mild, concise, efficient method for synthesis of 1,2,3,4‐tetrahydroquinolines is highly desired.…”

Section: Introductionmentioning

confidence: 99%

A Method for the Synthesis of 1,2,3,4‐Tetrahydroquinolines through Reduction of Quinolin‐2(1H)‐ones Promoted by SmI₂/H₂O/Et₃N

2022

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Palladium supported on magnesium hydroxyl fluoride: an effective acid catalyst for the hydrogenation of imines and N-heterocycles

Abstract: Palladium catalysts supported on acidic fluorinated magnesium hydroxide Pd/MgF2-x(OH)x were prepared through precipitation or impregnation methods. Applications to the hydrogenation of various aldimines and ketimines resulted in good catalytic activities...

Cited by 8 publications

References 95 publications

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO₂ at Different Temperatures under Ambient Pressure

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO₂ at Different Temperatures under Ambient Pressure

Selective Hydrogenation of Pyridine and Derivatives of It on Bimetallic Catalysts

A Method for the Synthesis of 1,2,3,4‐Tetrahydroquinolines through Reduction of Quinolin‐2(1H)‐ones Promoted by SmI₂/H₂O/Et₃N

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Palladium supported on magnesium hydroxyl fluoride: an effective acid catalyst for the hydrogenation of imines and N-heterocycles

Abstract: Palladium catalysts supported on acidic fluorinated magnesium hydroxide Pd/MgF2-x(OH)x were prepared through precipitation or impregnation methods. Applications to the hydrogenation of various aldimines and ketimines resulted in good catalytic activities...

Cited by 8 publications

References 95 publications

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO2 at Different Temperatures under Ambient Pressure

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO2 at Different Temperatures under Ambient Pressure

Selective Hydrogenation of Pyridine and Derivatives of It on Bimetallic Catalysts

A Method for the Synthesis of 1,2,3,4‐Tetrahydroquinolines through Reduction of Quinolin‐2(1H)‐ones Promoted by SmI2/H2O/Et3N

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Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO₂ at Different Temperatures under Ambient Pressure

Mg–O–F Nanocomposite Catalysts Defend against Global Warming via the Efficient, Dynamic, and Rapid Capture of CO₂ at Different Temperatures under Ambient Pressure

A Method for the Synthesis of 1,2,3,4‐Tetrahydroquinolines through Reduction of Quinolin‐2(1H)‐ones Promoted by SmI₂/H₂O/Et₃N