Стационарные энергетические установки с топливными элементами: материалы, технологии, рынки
M. : Научно-техническая фирма "Энергопрогресс", 2017.
Бредихин С. И., Голодницкий А. Э., Дрожжин О. А., Istomin S., Ковалевский В. П., Филиппов С. П.
Molecular dynamics simulation of the interaction of uranium (VI) with the C-S-H phase of cement in the presence of gluconate
, , Applied Geochemistry 2020 Vol. 113 Article 104496
Due to their high durability and immobilization properties, cementitious materials have found a considerable application in the design and construction of radioactive waste repositories in the last decades. During cement paste production, organic additives are introduced to modify various properties of cement. The presence of such organic complexants may negatively affect the immobilizing properties of ...
Added: February 26, 2020
, , et al., Macroheterocycles 2018 Vol. 11 No. 2 P. 155-161
Synthesis of bismuth complexes of etioporphyrin II, protoporphyrin IX dimethyl ester and three tetraphenylporphyrin derivatives in which iodine atom is an extraligand, was carried out. Obtained compounds were characterized by mass spectrometry, UV-vis, 1H NMR spectroscopy, and HPLC. The study of X-ray spectra showed that bismuth valence is +3. Bismuth atom coordinates four nitrogen atoms ...
Added: December 10, 2020
, , et al., Dyes and Pigments 2019 Vol. 161 P. 500-509
Two approaches for the synthesis of D-A chromophores containing arylhydrazonocyclopentadiene acceptor moieties were developed. The first approach includes the decarboxylative azo coupling reaction between penta(methoxycarbonyl)cyclopentadienyl potassium or sodium and aryldiazonium salts to give products containing four ester groups at the acceptor moiety. The second one includes the reaction of 1,3-dimethoxycarbonyl-4,5-diphenylcyclopentadienone with arylhydrazine hydrochlorides into arylhydrazonocyclopentadienes with two ester and ...
Added: October 14, 2020
Hybrid membranes based on polybenzimidazoles and silica with imidazoline-functionalized surface, candidates for fuel cells applications
, , et al., Ionics 2020 Vol. 26 P. 1853-1860
Hybrid membranes were prepared by incorporating silica with propyl-imidazoline groups in polybenzimidazoles (phthalide-containing PBI or PBI based on 2,6- or 2,5-pyridinedicarboxylic acids). The influence effects of the silica precursor hydrolysis conditions on the conductivity of the hybrid membranes are studied. Ionic conductivity, water uptake, phosphoric acid doping, and gas permeability of the obtained materials were ...
Added: April 2, 2020
Modeling and experimental verification of operation of supercapacitors with carbon electrodes in non-aqueous electrolytes. The energy efficiency
, , et al., Electrochimica Acta 2019 Vol. 319 P. 552-560
Charge-discharge processes of supercapacitor with carbon black KJEC 600/Li in non-aqueous electrolyte: 1 M LiPF6 in a mixture of ethylene carbonate (1/3), diethyl carbonate (1/3), dimethyl carbonate (1/3) are investigated. Galvanostatic cycling was carried out in the range from 1 to 4 V with currents from 100 to 5000 mA/g of carbon black. The maximum discharge capacity of ...
Added: December 5, 2019
Layered double hydroxide - borate composites supported on magnetic nanoparticles: preparation, characterization and molecular dynamics simulations
, , et al., Journal of Porous Materials 2020 Vol. 27 P. 735-743
Magnetic nanocomposites involving tetraborate ion (TB)-intercalated Mg–Al-layered double hydroxide (LDH) shell supported on magnesium ferrite core particles are synthesized, characterized, and compared with their non-magnetic analogues. The compositions of the obtained nanocomposites were determined and structural investigations were made by powder X-ray diffraction and Fourier transform infrared spectroscopy. Particle characteristics were examined by size distribution, ...
Added: February 26, 2020
, , et al., The Journal of Physical Chemistry Letters 2020 No. 11 P. 3821-3827
NaCl is one of the simplest compounds and was thought to be well-understood, and yet, unexpected complexities related to it were uncovered at high pressure and in low-dimensional states. Here, exotic hexagonal NaCl thin films on the (110) diamond surface were crystallized in the experiment following a theoretical prediction based on ab initio evolutionary algorithm USPEX. State-of-the-art ...
Added: May 8, 2020
, , et al., Перспективные материалы 2020 № 7 С. 5-18
Проведено прогнозирование новых халькошпинелей наиболее распространенных составов: AIBIIICIVX4 (X — S или Se) и AIIBIIICIIIS4 (A, B и C — разные химические элементы), перспективных для поиска новых материалов для магнитооптических элементов памяти, сенсоров и анодов в натрий-ионных батареях, и оценены значения параметра их кристаллической решетки “a”. При прогнозировании использовали только значения свойств химических элементов, входящих в состав еще не полученных соединений. ...
Added: July 29, 2020
, , et al., The Journal of Physical Chemistry Letters 2020 Vol. 11 P. 9393-9399
In pnictide RbEuFe4As4, superconductivity sets in at 36 K and coexists, below 15−19 K, with the long-range magnetic ordering of Eu 4f spins. Here we report scanning tunneling experiments performed on cold-cleaved single crystals of the compound. The data revealed the coexistence of large Rb-terminated and small Eu-terminated terraces, both manifesting 1 × 2 and ...
Added: October 24, 2020
Nanoscale catalyst based on a heterometallic carboxylate complex of platinum and iron for hydrogen-air fuel cells
, , et al., Materials Chemistry and Physics 2021 Vol. 259 Article 123968
A nanoscale bimetallic alloy catalyst PtFe/C is prepared by pyrolysis of the heterometallic platinum-iron carboxylate complex [PtFe(OAc)4]2O⋅4CH2Cl2 on Vulcan XC-72 carbon black. It is characterized by X-ray powder diffraction analysis, X-ray fluorescence spectroscopy, transmission electron microscopy, and electrochemical methods. Its activity in the oxygen reduction reaction (ORR) is tested in an aqueous H2SO4 electrolyte in model conditions, ...
Added: March 10, 2021
, , et al., Mendeleev Communications 2020 Vol. 30 No. 5 P. 647-649
A novel acceptor–donor–acceptor chromophore IDTT-HC2P with an indacenodithienothiophene core linked with two hydrazinylidenecyclopentadiene terminal acceptor groups was designed and synthesized via the reaction of dilithiated indacenodithienothiophene with the corresponding diazo compound. The frontier orbital energy levels as well as the bandgap which were estimated from both optical and electrochemical properties are very closely related to those of ...
Added: October 14, 2020
, , et al., Electrochimica Acta 2018 Vol. 284 P. 346-354
We propose and develop a classical density functional theory for the description of a minor amount of water dissolved in ionic liquid in the vicinity of an electrode. In addition to the electrostatic energy and lattice-gas mixing entropy terms, the utilised grand canonical potential contains several phenomenological terms/parameters that describe short-range interactions between ions of ...
Added: August 3, 2018
Synthesis of chromophores based on the hydrazinylidene cyclic acceptor moieties via the reaction of organolithium reagents with diazo compounds
, , et al., Dyes and Pigments 2019 Vol. 170 P. 107589
An approach to the synthesis of D-A chromophores containing hydrazinylidene cyclic acceptor moieties via the reaction of organolithium reagents with cyclic diazo compound precursors was developed. In contrast to conventional approaches the new one allows to introduce thiophene fragments into a chromophore molecule which is important for the better molecular planarity. The approach demonstrated convenience ...
Added: October 13, 2020
Density Functional Theory Model for Adsorption-Induced Deformation of Mesoporous Materials with Nonconvex Pore Geometry
, , , Journal of Physical Chemistry C 2020 Vol. 124 No. 37 P. 20046-20054
Adsorption of fluids in nanoporous media causes mechanical stresses which results in deformation. This phenomenon is ubiquitous and its magnitude depends on the pore size and geometry. Adsorption and adsorption-induced deformation are typically modeled in slit-shape or convex (cylindrical or spherical) pores. However, many porous materials are composed of spherical grains, so that the pores ...
Added: August 13, 2020
Push-pull molecules bearing a hydrazonocyclopentadiene acceptor moiety: from the synthesis to organic photovoltaic applications
, , et al., Mendeleev Communications 2019 Vol. 29 No. 3 P. 304-306
First representatives of a novel class of compounds containing an electron-accepting hydrazonocyclopentadiene moiety, π-conjugated phenylene spacer, and electron-donating triphenylamine moiety have been synthesized. Investigation of their optical, electrochemical and photovoltaic properties revealed a high potential of the hydrazonocyclopentadiene acceptor moiety in the design of donor-acceptor compounds for organic photovoltaics. ...
Added: October 14, 2020
, , et al., Физика и техника полупроводников 2017 Т. 51 № 8 С. 1028-1030
Thermoelements for thermoelectric coolers from fine-crystalline materials based on antimony and bismuth chalcogenide solid solutions of p- and n-type conductivities, obtained by hot pressing and extrusion from powders, made by melt spinning, were studied. Calculations of modules’ properties were performed in the range of 100−400K, taking into account temperature dependencies of thermoelectric parameters of legs, and the parameters of thermoelectric legs’ matching ...
Added: October 30, 2019
The Effect of the Cation-Exchange Membranes MK-40 Modification by Perfluorinated Sulfopolymer and Ceria on Their Transport Properties
, , , Russian Journal of Electrochemistry 2020 Vol. 56 P. 528-532
Composite materials based on heterogeneous membranes MK-40 modified by a thin layer of homogeneous cation-exchange perfluorinated sulfo membrane MF-4SK doped with 2 and 5% ceria are prepared. The transport characteristics of these membranes in different ionic forms are studied. It is shown that the conductivity of ionic forms of membranes increases in the sequence Li+ ...
Added: November 29, 2020
Исследование распределения температуры стержней из полимерных композитных материалов при их термообработке с использованием микроволнового излучения
, , , Измерительная техника 2019 № 4 С. 57-61
A method for constructing traveling wave type microwave device with a transverse interaction, forming a uniform temperature distribution over the volume of polymer composite rods is proposed. The results of theoretical and experimental studies of the temperature distribution of the rod material are presented. Advantages of microwave technologies of curing of polymeric composite materials in ...
Added: September 3, 2019
, , , Неорганические материалы 2022 Т. 58 № 4 С. 351-366
Рассмотрены опубликованные в последнее десятилетие исследования в области создания аккумуляторов на основе систем натрий–сера, работоспособных при температуре окружающей среды (низкотемпературные натрий-серные аккумуляторы (НСА)). Такие аккумуляторы отличаются от распространенных в настоящее время литий-ионных или литий-серных аналогов меньшей стоимостью и доступностью исходных материалов. Одной из главных проблем на пути создания низкотемпературных НСА с высокой удельной энергоемкостью и длительным циклированием ...
Added: November 25, 2022
Bari : Digilabs Pub., 2021
ASYS, the AIPEA School for Young Scientists. ASYS was successfully convened at the Andalusian Institute of Earth Sciences (CSIC-UGR, Granada, Spain) on July 15 and 16, 2017, under the supervision of Dr. Claro Ignacio Sainz Díaz, researcher of this centre, and in close connection to the 16th International Clay Conference in Granada (ICC 2017). Young and not so-young ...
Added: September 5, 2021
Radiation-induced chemistry in the C2H2–H2O system at cryogenic temperatures: a matrix isolation study
, , et al., Monthly Notices of the Royal Astronomical Society 2020 Vol. 491 No. 4 P. 5140-5150
Investigations of the low-temperature radiation-induced transformations in the C2H2–H2O system are relevant to the chemistry occurring in interstellar and cometary ices. In this work, we applied a matrix isolation technique to study the radiation-driven evolution of this system at molecular level in order to get new mechanistic insight. The 1:1 C2H2⋅ ⋅ ⋅H2O complexes were prepared in ...
Added: January 21, 2021
М. : [б.и.], 2021
Тематика Трудов конференции охватывает фундаментальные и прикладные вопросы взаимодействия плазмы и ионов с поверхностью - столкновительные процессы, ориентационные эффекты, распыление и рассеяние частиц, структурные повреждения, деградация и улучшение физико-механических свойств материалов при воздействии корпускулярного излучения и др. ...
Added: September 12, 2021
Investigation on the thickness distribution of highly customized titanium biomedical implants manufactured by superplastic forming
, , et al., CIRP Journal of Manufacturing Science and Technology 2018 No. 20 P. 29-35
Mechanical performances of titanium biomedical implants manufactured by superplastic forming are strongly related to the process parameters: the thickness distribution along the formed sheet has a key role in the evaluation of post-forming characteristics of the prosthesis. In this work, a finite element model able to reliably predict the thickness distribution after the superplastic forming ...
Added: December 1, 2017
Novel anion exchange membrane with low ionic resistance based on chloromethylated/quaternized‐grafted polystyrene for energy efficient electromembrane processes
, , , Journal of Applied Polymer Science 2020 Vol. 137 No. 19 P. 48656
A novel anion-exchange membrane has been manufactured by chloromethylation and subsequent quaternization of polystyrene within a graft copolymer films based on UV-oxidized polymethylpentene. Particular attention is given to the kinetics of chloromethylation and the influence of the reaction conditions on the properties of the anion-exchange membranes. By means of variation of the polystyrene content and ...
Added: February 27, 2020