Palladium-containing nanodiamonds in hydrogenation and hydroamination

Magdalinova, N. A.; Kalmykov, P. A.; Klyuev, M. V.

doi:10.1134/s0965544112050064

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…For example, it is shown (Aramendia et al, 1999;Golubina, Lokteva, Majouga, Lobanov & Lunin, 2011;Magdalinova, Kalmykov & Klyuev, 2012) that upon the formation of a high-effective Pd catalyst the structure of the active center is to contain both the reduced and the oxidized metal. However, in the common Pd catalyst preparation processes the reduction stage is always present, with a partially oxidized metal being difficult to obtain in this case.…”

Section: Resultsmentioning

confidence: 99%

Surface Modification of Detonation Nanodiamonds with Platinum and Palladium Nanoparticles

Isakova

Isakov²,

Lyamkin³

et al. 2014

IJC

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Acetylacetonates of platinum group metals (М(асас) n , асас= СН 3 СОСНСОСН 3 , n -oxidation state of metal) are the most suitable precursors for use in highly effective MOCVD (metal-organic chemical vapor deposition) processes because of their thermal properties, low price of initial ligand and accessible synthesis methods. In this study we have developed a simple, scalable inexpensive, MOCVD-like approach to the deposition of Pt and Pd nanoparticle dispersions on powder detonation nanodiamonds (DND) using combustion in air of powder mixtures of DND with Pt and Pd acetylacetonates. This one-step process requires no specialized apparatus, and is conducted at mild temperatures (180 o C -250 o C). The substrate surface of DND initiates chemical thermal destruction of precursor and deposition of nanoparticle networks composed of constituent particles. DND-supported Pd and Pt nanoparticles with their loading being from 10 and 5wt. % were obtained the average of particle size 20-25 nm and 7-10nm decreases with decreasing the metal loading. For additional purification and disaggregation of the commercial detonation-synthesized nanodiamond (DND comm ) the method of annealing of the powder mixtures DND comm with Na(acac) have been used. The purified diamond nanoparticulates (DND), as well as DND comm , Pt/DND and Pd/DND, were subjected to physicochemical characterizations, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis.

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Section: Resultsmentioning

confidence: 99%

Surface Modification of Detonation Nanodiamonds with Platinum and Palladium Nanoparticles

Isakova

Isakov²,

Lyamkin³

et al. 2014

IJC

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“…Hydrogenation reactions have been mostly catalyzed by supported Pd NPs and to a lesser extent using Ni NPs. In one of these studies, Pd NPs supported on D NPs exhibited excellent catalytic activity for the hydrogenation of CC and CC bonds 35,105,106 or nitrobenzene, 107 as well as the hydrogenating amination of propanal with 4-aminobenzoic acid. 105,106 In a related work, Pd NPs (10−20 nm) supported on commercial D NPs (300 m 2 g −1 ) previously oxidized at 300 °C under air atmosphere have been reported to be highly stable as a hydrogenation catalyst at 600 °C without observing sintering.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

“…In one of these studies, Pd NPs supported on D NPs exhibited excellent catalytic activity for the hydrogenation of CC and CC bonds 35,105,106 or nitrobenzene, 107 as well as the hydrogenating amination of propanal with 4-aminobenzoic acid. 105,106 In a related work, Pd NPs (10−20 nm) supported on commercial D NPs (300 m 2 g −1 ) previously oxidized at 300 °C under air atmosphere have been reported to be highly stable as a hydrogenation catalyst at 600 °C without observing sintering. 108 Later, Su and coworkers reported the higher activity of Pd NPs (∼4 nm) supported on commercial D NPs (BET 309 m 2 /g) with respect to an analogous catalyst based on AC to promote the hydrogenating denitrogenation of benzonitrile (Figure 16).…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Diamond Nanoparticles in Heterogeneous Catalysis

et al. 2020

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The use of diamond nanoparticles in catalysis has attracted considerable interest during the last three decades since these materials have been made commercially available. Diamond nanoparticles have been employed as supports of a small metal or metal oxide nanoparticles, as scaffolds for covalent grafting of organic molecules or metal complexes, and as carbocatalysts by generating a few layers of sp 2 carbons or other heteroatoms on the external surface. This review describes the main structural and chemical properties of diamond nanoparticles that have led to the development of catalysts with superior activity with respect to the use of analogous catalysts based on other carbon allotropes, carbon materials or even some benchmark metal oxides. These diamond-based materials have found superior applications as catalysts, photocatalysts, and more recently as carbocatalysts.

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“…Palladium NPs supported on nanodiamonds exhibit enhanced activity towards the hydrogenation of the C=C and C≡C bonds. They were also used in the hydrogenation of cyclohexene, allyl alcohol, nitrobenzene, azomethines, allyl alcohol, and simultaneously for the reductive amination of propanal with 4‐aminobenzoic acid. Careful study of these literature reports indicate that NDs are a good support for transition metals such as Pd.…”

Section: Introductionmentioning

confidence: 99%

Palladium Supported on Nanodiamonds as an Efficient Catalyst for the Hydrogenating Deamination of Benzonitrile and Related Compounds

et al. 2016

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Palladium nanoparticles were successfully prepared on a nanodiamond (ND) support and used for the hydrogenating deamination of benzonitrile, aromatic imines, and amines for the first time. The developed methodology was further used for the in situ conversion of aldehydes into hydrocarbons, including a biomass‐derived model compound. The activity of the catalyst was compared with palladium supported on activated carbon (AC) under identical conditions and the performance of Pd/ND was found to be superior to Pd/AC. The origin of the difference in the catalytic performance was considered. Finally, an attempt has been made to understand the mechanism through the identification of the side products by GCMS analysis.

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Palladium-containing nanodiamonds in hydrogenation and hydroamination

Cited by 10 publications

References 5 publications

Surface Modification of Detonation Nanodiamonds with Platinum and Palladium Nanoparticles

Surface Modification of Detonation Nanodiamonds with Platinum and Palladium Nanoparticles

Diamond Nanoparticles in Heterogeneous Catalysis

Palladium Supported on Nanodiamonds as an Efficient Catalyst for the Hydrogenating Deamination of Benzonitrile and Related Compounds

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