Artemiy B. Ayusheev

Ruthenium Clusters on Carbon Nanofibers for Formic Acid Decomposition: Effect of Doping the Support with Nitrogen

The catalytic properties of 1 wt % Ru catalysts with the same mean Ru cluster size of 1.4–1.5 nm supported on herringbone‐type carbon nanofibers with different N contents were compared for H2 production from formic acid decomposition. The Ru catalyst on the support with 6.8 wt % N gave a 1.5–2 times higher activity for the dehydrogenation reaction (CO2, H2) than the catalyst on the undoped support. The activity in the dehydration reaction (CO, H2O) was the same. As a result, the selectivity to H2 increased significantly from 83 to 92 % with N‐doping, and the activation energies for both reactions were close (55–58 kJ mol−1). The improvement could be explained by the presence of Ru clusters stabilized by pyridinic N located on the open edges of the external surface of the carbon nanofibers. This N may activate formic acid by the formation of an adduct (>NH+HCOO−) followed by its dehydrogenation on the adjacent Ru clusters.

Sibunit-based catalytic materials for the deep oxidation of organic ecotoxicants in aqueous solutions. III: Wet air oxidation of phenol over oxidized carbon and Rr/C catalysts

This article presents the first systematic study concerning the effect of the oxidative treatment conditions on the surface chemical composition and the catalytic properties in the deep wet oxidation of organic ecotoxicants of a Sibunit type carbon material (S4) which was earlier identified as promising for the oxidative treatment of industrial wastewaters. The influence of the surface chemistry of the carbon materials oxidized under different conditions on the catalytic performances in the wet air oxidation of phenol of the bare carbon materials as well as the ruthenium-containing catalysts (3 wt % Ru) supported on the oxidized carbon samples was studied. The catalytic activity of the bare carbon samples appeared to be moderate and either (i) increased with the total number of carbonyl and phenolic surface groups or (ii) decreased with the total concentration of surface carboxylic and lactonic species. However, the catalytic performances of the Ru-containing catalysts were significantly higher. Based on our results, an optimum pretreatment of the carbon support could be identified to obtain the most stable and active Sibunit-supported ruthenium catalysts in the wet air oxidation of phenols.

Methane Catalytic Peroxide Oxidation Over Fe-Containing Zeolite

Vadim V. Boltenkov*a, Oxana P. Tarana,b, Ekaterina V. Parkhomchuka,c, Svetlana A. Yashnika, Kseniya A. Sashkinaa, Artemiy B. Ayusheeva, Dmitrii E. Babushkina and Valentin N. Parmona,c aBoreskov Institute of Catalysis SB RAS 5 Akad. Lavrentiev, Novosibirsk, 630090, Russia bNovosibirsk State Technical University 20 Karl Marx, Novosibirsk, 630092, Russia cNovosibirsk State University 2 Pirogova Str., Novosibirsk, 630090, Russia

Depolymerization of Birch-Wood Organosolv Lignin Over Solid Catalysts in Supercritical Ethanol

Artemiy B. Ayusheev*a, Oxana P. Tarana,b, Irina I. Afinogenovaa,b, Tatyana I. Mishchenkoa, Michael V. Shashkova,c, Kseniya A. Sashkinaa,c, Victoria S. Semeikinaa,c, Ekaterina V. Parkhomchuka,c Vladimir E. Agabekovd and Valentin N. Parmona,c аBoreskov Institute of Catalysis SB RAS 5 Lavrentieva, Novosibirsk, 630090, Russia bNovosibirsk State Technical University 20 K. Marx, Novosibirsk, 630092, Russia cNovosibirsk State University 2 Pirogova Str., Novosibirsk, 630090, Russia dInstitute of Chemistry of New Materials NAS of Belarus 36 F.Skorina Str., Minsk, 220141, Republic of Belarus