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Каталог книг и брошюр библиотеки ИФ СО РАН

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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Isakov V. P., Isakova V. G., Lyamkin A. I., Yunoshev A. S.
Заглавие : Thermal decay of platinum metal acetylacetonates on the detonation nanodiamond surface
Коллективы : Российский федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики, "Экстремальные состояния вещества. Детонация. Ударные волны", международная конференция (2013 ; 18-22 марта; Саров), International conference "Extreme states of substance. Detonation. Shock waves" (2013 ; march ; 18- 22; Sarov, Russia), Харитоновские тематические научные чтения (15; 2013 ; март ; 18-22; Саров)
Место публикации : Экстремальные состояния вещества. Детонация. Ударные волны, междунар. конф.: Сб. тез. докл. - Саров, 2013. - P.401-402
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Isakova V. G., Isakov V. P., Lyamkin A. I., Zharikova N. V., Yunoshev A. S., Nemtsev I. V.
Заглавие : Surface modification of detonation nanodiamonds with platinum and palladium nanoparticles
Место публикации : Int. J. Chem. - 2015. - Vol. 7, No. 1. - P.1-9. - ISSN 1916-9698, DOI 10.5539/ijc.v7n1p1
Примечания : Cited References: 38
Ключевые слова (''Своб.индексиров.''): detonation-synthesized nanodiamond supports--platinum and palladium nanoparticles--combustion--chemical modific--dnd additional purification
Аннотация: Acetylacetonates of platinum group metals (M(acac)n, acac= CH3COCHCOCH3,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°C – 250°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 (DNDcomm) the method of annealing of the powder mixtures DNDcomm with Na(acac) have been used. The purified diamond nanoparticulates (DND), as well as DNDcomm, 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Filatov E. Y., Zadesenets A. V., Komogortsev S. V., Plyusnin P. E., Chepurov A. A., Korenev S. V.
Заглавие : Study of Co x Pt 1-x nanoalloy formation mechanism via single-source precursors
Место публикации : Powder Diffr. - 2019. - Vol. 34, Suppl. S1. - P.S27-S31. - ISSN 08857156 (ISSN) , DOI 10.1017/S0885715619000162
Примечания : Cited References: 13. - This work was supported by the Russian Foundation for Basic Research (Grant nos. 17-03-00950 and 18-03-00777). Aleksei Chepurov acknowledges support of the state assignment project 0330-2016-0012.
Аннотация: This paper is devoted to the study of formation mechanism of metal solid solutions during the thermolysis of single-source precursors in Co–Pt systems with a wide range of superstructural ordering. It is shown that the thermal decomposition of [Pt(NH3)4][Co(C2O4)2(H2O)2]·2H2O salt in helium is critically different from that under hydrogen atmospheres. Thermal degradation under the helium atmosphere is followed by a gradual reduction of platinum and cobalt, and at each thermolysis temperature only one phase is present. At 380 °C an equiatomic Co0.50Pt0.50 solid solution is formed (a = 3.749 (4) Å, Fm−3m space group, V/Z = 13.17 Å3, crystallite size: 5–7 nm). When the precursor is decomposed under a hydrogen atmosphere, the process proceeds mainly through the simultaneous reduction of the platinum and cobalt atoms, and at each temperature section two metal phases are present. The formation of the close to equiatomic Co0.50Pt0.50 solid solution (a = 3.782 (4) Å, Fm−3m space group, V/Z = 13.52 Å3, crystallite size: 7–9 nm) occurs at 450 °C. The calculations of crystallite sizes are confirmed by transmission electron microscopy data.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chudin O. S., Verpekin V. V., Vasiliev A. D., Rubaylo A. I.
Заглавие : Structure of a trinuclear μ3-vinylidene cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6
Место публикации : J. Struct. Chem. - 2017. - Vol. 58, Is. 3. - P.600-602. - ISSN 00224766 (ISSN), DOI 10.1134/S0022476617030234
Примечания : Cited References: 15
Ключевые слова (''Своб.индексиров.''): heterometallic clusters--iron--manganese--platinum--single crystal x-ray diffraction analysis--vinylidene complexes
Аннотация: The single crystal X-ray diffraction study of the heterometallic cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6 is performed. The crystallographic characteristics are as follows: a = 32.356(15) Å, b = 11.754(5) Å, c = 20.114(9) Å, β = 115.707(6)°, V = 6893(5) Å3, space group C2/c, Z = 8, dcalc = 1.741 g/cm3. The cluster molecule contains a bridging phenylvinylidene ligand coordinated to a metallic core in the form of a Mn–Fe–Pt chain (the Mn–Fe and Fe–Pt bond lengths are 2.6768(14) Å and 2.6280(11) Å respectively and the Mn⋯Pt distance is 3.6425(19) Å).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O.N., Melnikov A.M., Borisova T.V., Krylov A. S.
Заглавие : Simultaneous ion exchange recovery of platinum and rhodium from chloride solutions
Место публикации : Hydrometallurgy. - 2011. - Vol. 105, Is. 3-4. - P.341-349. - JAN. - ISSN 0304-386X, DOI 10.1016/j.hydromet.2010.11.009
Примечания : Cited Reference Count: 46
Предметные рубрики: GROUP-METALS PGM
SEPARATION
CATALYST
ANION
ADSORPTION
EXTRACTION
CHEMISTRY
RESIN
Ключевые слова (''Своб.индексиров.''): platinum--rhodium--sorption--anion exchangers--chloride solutions--anion exchangers--chloride solutions--platinum--rhodium--sorption--ammonium thiocyanate--anion exchangers--basic parameters--chemical structure--chloride solutions--diffusion coefficients--distribution coefficient--exchange capacities--kinetic properties--noble metals--purolite--rhodium chloride--separation factors--sorption ability--work focus--ammonium compounds--chlorine compounds--desorption--hydrochloric acid--ion exchange--ion exchange resins--ions--platinum--platinum compounds--potassium hydroxide--precious metals--recovery--rhodium--sulfuric acid--thioureas--urea--rhodium compounds
Аннотация: This work focuses on the sorption recovery of platinum (II, IV) and rhodium (III) simultaneously present in chloride solutions, freshly prepared and stored over 3 months, on commercial anion exchangers with different physical and chemical structure. The sorption was carried out from solutions with 0.001-4.0 mol/L HCl. The initial platinum and rhodium concentrations in contacting solutions were 0.25-2.5 mmol/L Sorption and kinetic properties of the chosen anion exchangers were investigated and the basic parameters of exchange capacity, recovery, distribution coefficients, separation factors, process rate, diffusion coefficients and half-exchange times were calculated. It is shown that anion exchangers investigated possess high sorption ability to platinum and rhodium chloride complexes, which does not deteriorate in case of stored solutions. Desorption of platinum and rhodium from the resins investigated was carried out with hydrochloric acid (2 mol/L), thiourea (1 mol/L) in sulfuric acid (2 mol/L) or in potassium hydroxide (2 mol/L) as well as by ammonium thiocyanate (2 mol/L). It was shown that complete separation of platinum and rhodium can be carried out with 2 mol/L HCl on anion exchanger Purolite S 985, whereas 2 mol/L NH(4)SCN as an elution agent leads to complete separation of noble metals on anion exchangers Purolite S 985, Purolite A 500 and AM-2B. (C) 2010 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasilchenko D., Vorob'eva S., Tkachev S., Baidina I. A., Belyaev A., Korenev S., Solovyov L., Vasiliev A. D.
Заглавие : Rhodium(III) speciation in concentrated nitric acid solutions
Коллективы : Russian Foundation for Basic Research [16-03-00549 A]; Ministry for Education and Science of the Russian Federation
Место публикации : Eur. J. Inorg. Chem.: Wiley-VCH Verlag, 2016. - Vol. 2016, Is. 23. - P.3822-3828. - ISSN 1434-1948, DOI 10.1002/ejic.201600523. - ISSN 1099-0682(eISSN)
Примечания : Cited References:31. - This work was supported by the Russian Foundation for Basic Research (grant number 16-03-00549 A). D. V. thanks the Ministry for Education and Science of the Russian Federation for the award of a President of the Russian Federation for Young Scientists Fellowship.
Предметные рубрики: MAGNETIC-RESONANCE
FISSION PLATINOIDS
AQUEOUS-SOLUTIONS
PT-195 NMR
RH(III)
SPECTROSCOPY
CHEMISTRY
DISSOCIATION
PLATINUM(IV)
COMPLEXES
Ключевые слова (''Своб.индексиров.''): rhodium--nmr spectroscopy--nitrates
Аннотация: The interaction of rhodium(III) aqua ions with nitrate ions in 3–16 m nitric acid solutions has been studied by 103Rh and 15N NMR and Raman spectroscopy. The mononuclear complexes [Rh(H2O)6–n(NO3)n]3–n (n = 1–4) were found to be the only form of rhodium(III) existing in the solutions with the metal concentration in the range 0.2–1.3 m. The dynamics of the H2O → NO3– substitution process was studied at 80 °C. An increase in the average number of nitrate groups bonded to rhodium with increasing concentration of nitric acid was also determined. The fine crystalline salt Rb4trans-[Rh(H2O)2(NO3)4][Rh(NO3)6] was obtained by solvothermal concentration of the rhodium nitric acid solution on addition of rubidium nitrate. The structure of the salt was solved by the powder X-ray diffraction method, with monodentate coordination of nitrato ligands found for both the [Rh(NO3)6]3– and trans-[Rh(H2O)2(NO3)4]– anions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Medovikov D. V., Krylov A. S.
Заглавие : Ion-exchange sorption of palladium(II) from hydrochloric acid solutions in the presence of silver(I)
Место публикации : Russ. J. Phys. Chem. A. - 2018. - Vol. 92, Is. 10. - P.2053-2059. - ISSN 0036-0244, DOI 10.1134/S0036024418100138. - ISSN 1531-863X(eISSN)
Примечания : Cited References: 36
Предметные рубрики: PLATINUM-GROUP METALS
RECOVERY
COMPLEXES
CHLORIDE
PD(II)
Ключевые слова (''Своб.индексиров.''): palladium--silver--hydrochloric acid solutions--sorption--sorptive extraction
Аннотация: The sorptive extraction of palladium(II) chloride complexes in the presence of silver(I) chloride complexes from 2 and 4 M aqueous solutions of HCl with a series of Purolite anionites with different functional groups is studied. An anion exchange mechanism of sorption is identified from Raman spectroscopy data. Kinetic properties that are inherent to the investigated ionites and allow the elution of palladium(II) and silver(I) after their extraction in a dynamic mode are revealed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Karplyakova N. S., Krylov A. S.
Заглавие : Ion-exchange extraction of platinum(II,IV) from chloride solutions in the presence of iron(III)
Место публикации : Russ. J. Phys. Chem. A: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 89, Is. 8. - P.1464-1470. - ISSN 0036-0244, DOI 10.1134/S0036024415080166. - ISSN 1531-863X
Примечания : Cited References: 28
Предметные рубрики: RHODIUM
Ключевые слова (''Своб.индексиров.''): platinum--iron--ionites--sorption--hydrochloric solutions--sorption
Аннотация: The sorption concentration of platinum(II,IV) in the presence of iron(III) is studied on new samples of domestically produced ionites of the CYBBER brand. In comparing the sorption and kinetic properties of the new ionites to those of sorbents of the Purolite brand studied earlier, the higher effectiveness of the former is demonstrated via the extraction of platinum(II,IV) ions from strongly and weakly acidic chloride solutions. It is found that the sorbed platinum ions can be completely separated from iron(III) ions through separate elution using 0.01-0.001 M HCl (iron ions) and a thiourea solution (80 g/L) in 0.3 M H2SO4 (platinum ions).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Efimova A. S., Ivanov A. I., Krylov A. S.
Заглавие : Ion exchange recovery of platinum(IV) from hydrochloric acid solutions in the presence of silver(I)
Место публикации : Russ. J. Phys. Chem. A. - 2020. - Vol. 94, Is. 4. - P.828-834. - ISSN 0036-0244, DOI 10.1134/S003602442004007X. - ISSN 1531-863X(eISSN)
Примечания : Cited References: 35
Предметные рубрики: GROUP METALS
SORPTION
PALLADIUM
RESINS
Аннотация: The ion exchange sorption of the platinum(IV) chloride complexes in the presence of silver(I) chloro complexes from 2 and 4 M aqueous solutions of hydrochloric acid is studied on Purolite anion exchangers with different functional groups. The high selectivity of the investigated sorbents with respect to platinum during its recovery from individual hydrochloric acid solutions and in the presence of silver chloride complexes is determined. Since the latter are in this case virtually not sorbed in the presence of platinum(IV), they can be separated at the stage of sorption. The excellent kinetic properties of the investigated anion exchangers are revealed, allowing platinum to be eluted after its separation from silver chloro complexes in a dynamic mode.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mel'nikov A. M., Kononova O. N., Pavlenko N. I., Krylov A. S.
Заглавие : Ion exchange equilibria in simultaneous extraction of platinum(II, IV) and rhodium(III) from hydrochloric solutions
Место публикации : Russ. J. Phys. Chem. A: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 86, Is. 6. - P.1018-1024. - ISSN 0036-0244, DOI 10.1134/S0036024412060192
Примечания : Cited References: 24
Ключевые слова (''Своб.индексиров.''): platinum--rhodium--ionites--ion exchange equilibria--hydrochloric acid solutions--sorption
Аннотация: Regularities of sorption extraction of platinum(II, IV) and rhodium(III) by anion exchangers of various physical and chemical structure in the presence of hydrochloric media were studied. It is established that AM-2B, Purolite A 500, and Purolite S 985 ionites adsorb complex anions of platinum metals employing mixed mechanism. A high affinity of the studied anionites for the studied complex anions of platinum and rhodium is established.
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