Highly dispersed Ni nanoparticles on mesoporous silica nanospheres by melt infiltration for transfer hydrogenation of aryl ketones

Kweon, Hyemin; Jang, Sanha; Bereketova, Akerke; Park, Kang Hyun

doi:10.1039/c9ra01608b

Cited by 8 publications

(2 citation statements)

References 53 publications

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“…Kweon et al . recently synthesisied a nickel nanocatalyst supported on mesoporous silica (mSiO 2 @Ni) employed in the TH of ketones and have reported the yiled of 1‐(4‐methylphenyl)ethanol and 1‐(4‐methoxyphenyl)ethanol only 45 and 34 % respectively on TH of corresponding acetophenone derivatives [2c] . The scope of the new catalyst Lignin@Ni‐NPs was also tested on TH of pyridine derivatives.…”

Section: Resultsmentioning

confidence: 99%

Lignin@Ni‐NPs: A Novel, Highly Efficient, Recyclable, and Selective Nanocatalyst for Base‐Free Transfer Hydrogenation Reactions at Room Temperature

Bharamanagowda

Kumar

2022

ChemistrySelect

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Nickel nanoparticles were synthesized readily by sonication of a mixture of nickel(II) chloride hexahydrate, hydrazine hydrate, lignin and water at 60 °C. This lignin supported nickel nanoparticles (Lignin@Ni‐NPs) have been characterized by UV‐Visible, PXRD, EDX, SEM and TEM techniques. The average size of Ni‐NPs was found in the range of 15‐20 nm as revealed by TEM micrographs. The amount of nickel(0) loaded in Lignin@Ni‐NPs determined by EDX was 36.6 %. The catalytic activity of Lignin@Ni‐NPs have been evaluated in the transfer hydrogenation of carbonyl compounds into the corresponding alcohols. The catalyst have been found efficient for hydrogen‐transfer reduction of functionalised and non‐fuctionalised including heteroaromatic carbonyl compounds as the desired alcohols were obtained in high yields of about 90‐95 % at room temperature, under base‐free conditions and in short reaction times. The catalyst was recovered by simple filtration and it has an advantage of being reuable more than six times without significant loss in its catalytic activity.

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Section: Resultsmentioning

confidence: 99%

Lignin@Ni‐NPs: A Novel, Highly Efficient, Recyclable, and Selective Nanocatalyst for Base‐Free Transfer Hydrogenation Reactions at Room Temperature

Bharamanagowda

Kumar

2022

ChemistrySelect

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“…The typical processes used for the synthesis of NPs include co-precipitation, electrosynthesis, wet chemical reduction, microemulsion, and hydrothermal synthesis [13][14][15][16][17][18][19][20][21]. Alternatively, eco-friendly syntheses utilize a solvent-free process, such as grinding or melt infiltration [22][23][24][25][26][27][28][29]. In particular, grinding via ball-milling is a highly efficient and environmentally sustainable approach to the manufacture of nanomaterials [22].…”

Section: Introductionmentioning

confidence: 99%

Non-Solvent Synthesis of a Robust Potassium-Doped PdCu-Pd-Cu@C Nanocatalyst for High Selectively Tandem Reactions

et al. 2021

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A non-solvent synthesis of alkali metal-doped PdCu-Pd-Cu@C is presented that needs no mechanical grinding and utilizes heat treatment under an N2 gas flow. Pluronic® F127 is used to generate pores and a high surface area, and tannic acid is used as a carbon source for the PdCu-Pd-Cu@C nanocatalysts. Because some C is transferred to organic compounds during the nitrogen heat treatment, this demonstrated the advantage of raising the weight ratio of active metals comparatively. The PdCu-Pd-Cu@C nanocatalyst developed in this study outperformed commercial Pd/C catalysts by bimetallic PdCu-Pd-Cu nanoparticles and Pd nanoparticles in terms of catalytic activity (selectivity of commercial Pd/C: 45%; PdCu-Pd-Cu@C nanocatalyst: 76%). The alkali metal dopants increase the selectivity of the final product on the PdCu-Pd-Cu@C surface because they are electron-rich, which assists in the adsorption of the substrate (selectivity of PdCu-Pd-Cu@C nanocatalyst: 76%; K-doped PdCu-Pd-Cu@C nanocatalysts: 90%). Furthermore, even after being reused 5 times in this research, the final catalytic performance was comparable to that of the initial catalyst.

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Facile Transformation of Ni‐based Colloids into Highly Stable Nanocatalysts Embedded within h‐BN for the Water‐Gas Shift Reaction

Gao

Dong

et al. 2020

ChemCatChem

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Advances in colloidal chemistry allow to prepare well‐controlled nanostructures, while application of the colloids in heterogeneous catalysis is strongly impeded by the presence of organic capping layers. However, removal of the protection layers inevitably results in changes of the well‐defined nanostructures such as sintering and agglomeration. Here, a simple way is suggested to solve the dilemma by replacing the organic capping layers with another flexible but robust capping layers made of two‐dimensional materials. We show simultaneous removal of surfactant layers in B‐containing Ni, Co, and Fe colloids and formation of hexagonal boron nitride (h‐BN) capping layers over metal nanoparticles. Metal particle size can be well kept even upon thermal treatment at 850 °C and Ni nanocatalysts embedded within h‐BN shells present high catalytic performance in water‐gas shift reaction. This work suggests a facile strategy to promote the application of metal colloids in heterogeneous catalysis.

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Highly dispersed Ni nanoparticles on mesoporous silica nanospheres by melt infiltration for transfer hydrogenation of aryl ketones

Cited by 8 publications

References 53 publications

Lignin@Ni‐NPs: A Novel, Highly Efficient, Recyclable, and Selective Nanocatalyst for Base‐Free Transfer Hydrogenation Reactions at Room Temperature

Lignin@Ni‐NPs: A Novel, Highly Efficient, Recyclable, and Selective Nanocatalyst for Base‐Free Transfer Hydrogenation Reactions at Room Temperature

Non-Solvent Synthesis of a Robust Potassium-Doped PdCu-Pd-Cu@C Nanocatalyst for High Selectively Tandem Reactions

Facile Transformation of Ni‐based Colloids into Highly Stable Nanocatalysts Embedded within h‐BN for the Water‐Gas Shift Reaction

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