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1.
P. V. Snytnikov K. V. Yusenko S. V. Korenev Yu. V. Shubin V. A. Sobyanin 《Kinetics and Catalysis》2007,48(2):276-281
The performance of a Co-Pt powder and of Co-Pt catalysts supported on γ-Al2O3 and on the graphite-like carbon material Sibunit in selective CO oxidation in hydrogen-containing mixtures is considered. Fine particles of metal-metal solid solutions and intermetallides were obtained by the decomposition of a Co- and Pt-containing double complex salt in a hydrogen atmosphere at ~400°C. As compared to their Pt and Co monometallic counterparts, the bimetallic catalysts are more active and allow the CO concentration in hydrogen-containing mixtures to be reduced from 1 to 10?3 vol %. This effect is likely due to the formation of bimetallic particles of a Co-Pt solid solution on the support surface. 相似文献
2.
I. V. Korol’kov A. I. Gubanov K. V. Yusenko I. A. Baidina S. A. Gromilov 《Journal of Structural Chemistry》2007,48(3):486-493
Several non-equilibrium solid solutions belonging to the platinum-osmium systems Os0.9Pt0.1, Os0.8Pt0.2, Os0.5Pt0.5, Os0.7Pt0.3, Os0.75Pt0.25 are prepared and studied. The thermal decomposition of [Pt(NH3)4][OsCl6] in the hydrogen and helium atmosphere is investigated. It is found that the Pt0.5Os0.5 solid solution develops through the formation of (NH4)2[OsCl6] and a metallic phase based on Pt. The crystal structure of a double complex salt [Pt(NH3)4][OsCl6] is studied (X8-APEX Bruker, 1508 independent reflections, R = 2.04%). Crystal data for PtOsN4Cl6H12 are: a = 11.6216(5) Å, b = 11.0016(5) Å, c = 10.3819(5) Å, V = 1327.4(1) Å3, space group Cmca, Z = 4, d x = 3.333 g/cm3. The coordination polyhedron around Os is octahedral: 〈Os-Cl〉 2.357 Å, ∠Cl-Os-Cl 89.5–90.5°, while around Pt it is square-planar: Pt-N 2.046 Å, ∠ N-Pt-N 89.59° and 90.41°. 相似文献
3.
S. P. Khranenko E. A. Bykova K. V. Yusenko A. P. Tyutyunnik S. A. Gromilov 《Journal of Structural Chemistry》2013,54(5):931-936
X-ray crystallographic analysis is used to determine the crystal structures of [Ru(NH3)6](MoO4)Cl·3H2O and [M(NH3)6](ReO4)3·2H2O (M = Ru, Ir) complex salts. The features of the fragment packing are studied. 相似文献
4.
S. A. Martynova K. V. Yusenko I. V. Korol’kov S. A. Gromilov 《Russian Journal of Inorganic Chemistry》2007,52(11):1733-1738
The double complex salts [Ir(NH3)5Cl][IrCl6], [Ru(NH3)5Cl][IrCl6], and [Ru(NH3)5Cl]2[IrCl6]Cl2 have been synthesized and characterized. An X-ray diffraction study demonstrated that these salts are isostructural with [Rh(NH3)5Cl][OsCl6] and [Ir(NH3)5Cl]2[PtCl6]Cl2 synthesized earlier. Thermolysis of these salts in hydrogen and helium has been studied. X-ray powder diffraction analysis show that thermolysis yields stoichiometric solid solutions of metals as the final products. The unit cell parameters of these products correspond to equilibrium phases. 相似文献
5.
Zacher D Yusenko K Bétard A Henke S Molon M Ladnorg T Shekhah O Schüpbach B de los Arcos T Krasnopolski M Meilikhov M Winter J Terfort A Wöll C Fischer RA 《Chemistry (Weinheim an der Bergstrasse, Germany)》2011,17(5):1448-1455
The progressive liquid-phase layer-by-layer (LbL) growth of anisotropic multicomponent layer-based porous coordination polymers (PCPs) of the general formula [M(L)(P)(0.5)] (M: Cu(2+), Zn(2+); L: dicarboxylate linker; P: dinitrogen pillar ligand) was investigated by using either pyridyl- or carboxyl-terminated self-assembled monolayers (SAMs) on gold substrates as templates. It was found that the deposition of smooth, highly crystalline, and oriented multilayer films of these PCPs depends on the conditions at the early growth cycles. In the case of a two-step process with an equimolar mixture of L and P, growth along the [001] direction is strongly preferred. However, employing a three-step scheme with full separation of all components allows deposition along the [100] direction on carboxyl-terminated SAMs. Interestingly, the growth of additional layers on top of previously grown oriented seeding layers proved to be insensitive to the particular growth scheme and full retention of the initial orientation, either along the [001] or [100] direction, was observed. This homo- and heteroepitaxial LbL growth allows full control over the orientation and the layer sequence, including introduction of functionalized linkers and pillars. 相似文献
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7.
Phase transformations of the Re<Subscript>0.3</Subscript>Ir<Subscript>0.7</Subscript> solid solution
S. A. Gromilov I. V. Korolkov K. V. Yusenko S. V. Korenev T. V. D’yachkova Yu. G. Zainullin A. P. Tyutyunnik 《Journal of Structural Chemistry》2005,46(3):474-478
Transformations of the nonequilibrium solid solution Re0.3Ir0.7 at increased pressure (1–10 GPa) and temperature (2000°C) have been studied. A phase transition from the hexagonal close-packed cell to the face-centered cubic cell without a loss of density and volume per atom has been detected. 相似文献
8.
K. A. Yusenko 《Ukrainian Mathematical Journal》2006,58(9):1462-1470
We describe the set of γ ∈ ℝ for which there exist quadruples of projectors P
i
for a fixed collection of numbers αi ℝ+,
, such that α1
P
1 + α2
P
2 + α3
P
3 + α3
P
4 = γI.
__________
Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 58, No. 9, pp. 1289–1295, September, 2006. 相似文献
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