M. V. Klyuev

Hydrogenation catalysts based on platinum- and palladium-containing nanodiamonds

Platinum and palladium nanoparticles of 4–5 nm size applied at nanodiamonds have been shown to efficiently catalyze liquid-phase hydrogenation of different organic compounds (nitrocompounds, azomethines, and unsaturated hydrocarbons and alcohols) under mild conditions (T = 318 K, hydrogen pressure of 0.1 MPa, solution in ethanol). Using of palladium on nanodiamond containing 3 wt % of metal has been most efficient.

Comparison of palladium catalysts based on nanodiamonds and activated carbon in hydrogenation reactions

Comparison of palladium catalysts (1 wt % Pd) based on nanodiamonds and activated carbon in the liquid-phase hydrogenation of organic compounds of different nature (some aromatic nitro compounds, unsaturated hydrocarbons, alcohols, and acids) under mild conditions (T = 318 K;

Palladium-containing graphene-like material: Synthesis and catalytic activity

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A study of palladium hydrogenation catalysts based on nanodiamonds and activated carbon

= 0.1 MPa; solvent, ethanol) has been conducted. It has been found that the palladium catalyst based on nanodiamonds is more active in the hydrogenation reaction and more sensitive to a change in the nature of the substrate than its counterpart based on activated carbon.

Metal-containing graphene-like materials: Synthesis and use in hydrogenation

Interaction between hydroxyoxo(5,10,15,20-tetraphenylporphyrinato)molybdenum(V) and 2′-(pyridin-4-yl)-5′-(pyridin-2-yl)-1′-(pyridin-2-yl)methylpyrrolidinyl[60]fullerene in toluene has been studied by means of spectrophotometry. The reaction proceeds via two stages: rapidly established equilibrium between the reactants and their molecular complex 1: 1 [K = (1.97 ± 0.52) × 104 L/mol] followed by slow irreversible displacement of hydroxy group into the second coordination sphere to form cationic outer sphere complex (k = 0.26 L s−1 mol−1). The effect of fullerene fragment on pyridine fragments coordination has been considered.

Hydrogenation and hydroamination in the presence of catalysts based on platinum and carbon nanofibers

A graphene-like material with surface amine groups is obtained by graphite oxide reduction with ethylenediamine. A catalyst for the hydrogenation of nitrocompounds and unsaturated hydrocarbons is created by depositing Pd nanoparticles on the graphene material. The aliphatic chain is found to prevent agglomeration of the graphene sheets, while the amine groups form the growth centers of palladium nanoparticles, allowing their uniform distribution and small size.

Hydrogenation of Nitro and Unsaturated Organic Compounds over Catalysts Containing Nanosized Palladium Particles

The preparation of palladium-containing graphene-like materials modified with amines is described. The structure of the resulting materials is studied by a complex of physicochemical methods. The materials are tested as hydrogenation and hydrodehalogenation catalysts. It is shown that the characteristics of these catalysts are superior to those of the commercial counterpart, viz., palladium-containing activated carbon.

Synthesis of statistical carbazole–fluorene–thiophene–benzothiadiazole copolymers and their investigation in organic solar cells

Palladium hydrogenation catalysts based on nanodiamonds and activated carbon with a metal content of 1 wt % have been studied by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). It has been shown that the nature of the support has an effect on the electron binding energy of palladium and the stability of metal sites formed during supporting. The resulting catalysts exhibit activity in the model nitrobenzene and cyclohexene hydrogenation reactions under mild conditions (T = 318 K;