Preparation and characterization of nickel aluminosilicate nanocomposites for transfer hydrogenation of carbonyl compounds

Neelakandeswari, N.; Sangami, G.; Emayavaramban, P.; Babu, Sundaram Ganesh; Karvembu, Ramasamy; Dharmaraj, N.

doi:10.1016/j.molcata.2011.12.029

Cited by 21 publications

(9 citation statements)

References 19 publications

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“…The reactivity order is cyclohexanone (92%) > cycloheptanone (88%) > cyclododecanone (77%). But nickel/aluminosilicate catalyst yielded only 58% of cyclohexanone under similar reaction conditions [45]. 100% Selectivity was accomplished when carbonyl functionality was present in the side chain of the alicyclic ring (Table 3, entry 15).…”

Section: Extension Of Scopementioning

confidence: 94%

Nanostructured RuO2 on MWCNTs: Efficient catalyst for transfer hydrogenation of carbonyl compounds and aerial oxidation of alcohols

Gopiraman

Babu

Karvembu

et al. 2014

Applied Catalysis A: General

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Multiwall carbon nanotubes (MWCNTs)/ruthenium dioxide nanoparticles (RuO 2 NPs) composite was prepared by a straightforward 'dry synthesis' method. After being well characterized, the prepared composite was used as a nanocatalyst (RuO 2 /MWCNT) for the transfer hydrogenation of carbonyl compounds. The excellent adhesion of RuO 2 NPs on the anchoring sites of MWCNTs was confirmed by TEM and Raman analyses. The weight percentage (7.97 wt%) and the chemical state (+4) of Ru in RuO 2 /MWCNT was confirmed by EDS and XPS analyses, respectively. It was found that the RuO 2 /MWCNT has a higher specific surface area of 189.3 m 2 g -1 . Initially the reaction conditions were optimized and then the scope of the catalytic system was extended with a wide range of carbonyl compounds. The influence of the size of RuO 2 NPs on the transfer hydrogenation of carbonyl compounds was also studied. The RuO 2 /MWCNT is highly chemoselective, heterogeneous in nature, reusable and highly stable. Owing to the high stability of the used catalyst (u-RuO 2 /MWCNT), it was further calcinated at high temperature to obtain RuO 2 nanorods (NRs) hybrid MWCNTs. Then the hybrid material was used as a catalyst (r-RuO 2 /MWCNT) for the aerial oxidation of alcohols and the result was found to be good.

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Section: Extension Of Scopementioning

confidence: 94%

Nanostructured RuO2 on MWCNTs: Efficient catalyst for transfer hydrogenation of carbonyl compounds and aerial oxidation of alcohols

Gopiraman

Babu

Karvembu

et al. 2014

Applied Catalysis A: General

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“…Among these oxides, nickel was present as NiO, so that a reduction to Ni(0) was required. Production of Ni(0) nanoparticles used as catalyst for H-transfer hydrogenation has been previously performed by reduction of Ni(II) salts with several reducing agents, such as metal lithium [31][32][33][34][35], hydrazine [36][37][38][39][40], NaBH 4 [41][42][43], ethylene glycol [44][45][46], oleylamine/trioctylphosphine [47] or by thermal decomposition of nickel isopropoxide, prepared with an excess of Li, Na or K metal [48]. In spite of their efficiency, these reducing agents are toxic or hazardous to manipulate.…”

Section: Resultsmentioning

confidence: 99%

Bio-based and environmental input for transfer hydrogenation using EcoNi(0) catalyst in isopropanol

Escande

Poullain

Clavé

et al. 2017

Applied Catalysis B: Environmental

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The transfer hydrogenation of carbonyl compounds into alcohols with isopropanol has emerged as a green alternative to the use of hazardous reducing agents. Ni(0) nanoparticles have been described as an efficient catalyst for this reaction, while their classical preparation is still associated with a number of safety and environmental concerns. Here, we report a sustainable, ecological and straightforward preparation of a biosourced Ni(0) based material, by thermal decomposition of Ni(II) formate made from a Ni hyperaccumulating plant. The resulting catalyst, EcoNi(0), shows high catalytic activity and selectivity for the transfer hydrogenation of carbonyl compounds, including challenging aldehydes. The process seeks to be an incentive for the economic development of phytoextraction.

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“…2-Acetylthiophene was reduced to 1-thiophene ethanol (72%) with high selectivity (Table 1, entry 17) while nickel aluminosilicate system gave only 48% of the product. 24 Similarly, 1-furyl ethanone yielded 1-furyl ethanol with a yield of 82% (Table 1, entry 18) whereas the MgO/Al 2 O 3 catalyzed reaction yielded only 50% of the product. 21 There can be two possible reasons for the higher catalytic activity of GNPs-RuNRs: (i) higher surface area of GNPs and (ii) effective dispersion of the GNPs-RuNRs in the reaction medium.…”

Section: Entry 12) It Is Worth Mentioning Thatmentioning

confidence: 99%

Facile and homogeneous decoration of RuO2 nanorods on graphene nanoplatelets for transfer hydrogenation of carbonyl compounds

Gopiraman

Babu

Kim

et al. 2013

Catal. Sci. Technol.

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Preparation and characterization of nickel aluminosilicate nanocomposites for transfer hydrogenation of carbonyl compounds

Cited by 21 publications

References 19 publications

Nanostructured RuO2 on MWCNTs: Efficient catalyst for transfer hydrogenation of carbonyl compounds and aerial oxidation of alcohols

Nanostructured RuO2 on MWCNTs: Efficient catalyst for transfer hydrogenation of carbonyl compounds and aerial oxidation of alcohols

Bio-based and environmental input for transfer hydrogenation using EcoNi(0) catalyst in isopropanol

Facile and homogeneous decoration of RuO2 nanorods on graphene nanoplatelets for transfer hydrogenation of carbonyl compounds

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