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Ярославцев Андрей Борисович

Базовая кафедра неорганической химии и материаловедения Института общей и неорганической химии им. Н.С. Курнакова РАН

Профиль на hse.ru ↗ тел.: 23530
Публикаций
90
Языков
1
Наград
8
Конференций
1
Профиль Публикации (90) Курсы (6)

Профессиональные интересы

мембраныИонная проводимость

Должности

  • Заведующий кафедрой — Базовая кафедра неорганической химии и материаловедения Института общей и неорганической химии им. Н.С. Курнакова РАН
  • Профессор — Базовая кафедра неорганической химии и материаловедения Института общей и неорганической химии им. Н.С. Курнакова РАН
  • Академический директор — Аспирантская школа по химии

Био

  • · Начал работать в НИУ ВШЭ в 2009 году.
  • · Научно-педагогический стаж: 33 года.

Образование

  • 2006 · Член-корреспондент РАН
  • 1995 · Ученое звание: Профессор
  • 1995 · Доктор наук
  • 1978 · Специалитет: Московский государственный университет им. М.В. Ломоносова, специальность «Химия», квалификация «Химик»

Опыт работы

  • · 1994-2018: Институт общей и неорганической химии РАН им. Н.С. Курнакова:
  • · Ведущий научный сотрудник, Заведующий сектором, Заведующий лабораторией, Главный научный сотрудник
  • · 2010-2018: Институт нефтехимического синтеза РАН им. А.В. Топчиева:
  • · Заведующий лабораторией
  • · 1997-2009: Российский фонд фундаментальных исследований:
  • · Начальник отдела, Ответственный секретарь
  • · 1994-2018: Российский химико-технологический университет им. Д.И.Менделеева:
  • · Профессор
  • · 2009-2018: Московский государственный университет им. М.В.Ломоносова:
  • · Младший научный сотрудник, ассистент, доцент, профессор

Награды и поощрения

  • · Почетная грамота НИУ ВШЭ (март 2026)
  • · Благодарность НИУ ВШЭ (март 2024)
  • · Медаль Ордена "За заслуги перед Отечеством" II степени (февраль 2024)
  • · Благодарность Факультета химии НИУ ВШЭ (февраль 2023)
  • · Благодарственное письмо проректора НИУ ВШЭ (ноябрь 2021)
  • · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2025–2026, 2024–2025, 2023–2024)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023, 2021–2022, 2019–2020)
  • · Лучший преподаватель — 2025

Гранты и проекты

  • — · на соискание учёной степени кандидата наук

Конференции (1)

Показать все
  • · 2018: 14th International Conference “Fundamental problems of solid state ionics” (Черноголовка). Доклад: Ion transport in composite membranes based on polybenzimidazoles and silica with modified surface

Идентификаторы исследователя

  • ORCID: 0000-0001-8446-6198
  • ResearcherID: C-2070-2013
  • SPIN РИНЦ: 8429-8844
  • Scopus AuthorID: 7005239278

Публикации (90)

The influence of the support composition and structure (MxZr1-xO2-d) of bimetallic catalysts on the activity in methanol steam reforming

2018 · ARTICLE · en

Metal oxide-stabilized zirconia supports (MxZr1-xO2-δ) with different dopants (M = Y, La, Ce) were prepared by coprecipitation method. Bimetallic CuNi and RuRh catalystssupported on MxZr1-xO2-δ were prepared by the sequential wetness impregnation method, for use in hydrogen production by methanol steam reforming. The effect of the nature and quantity of the dopant cation (M = Y, Ce) on the catalytic performance of zirconia supported metal catalysts was investigated. The activity of NiCu/YxZr1-xO2-(x/2) (x = 0.1–0.3) samples increases with an increase in yttrium concentration due to the formation of oxygenvacancies. The dependence of the catalytic activity on the ceria concentration was not monotonous. The sample containing 10% of cerium oxide showed the highest activity. The performance of a NiCu/La0·1Zr0,9O1.95 sample was compared with the performance of a Y and Ce containing samples with the same quantity of dopant cation (10%). The La doped catalyst was more active than the yttria-containing composites, but its selectivity was lower. The catalyst based on RuRh alloy differed with significantly higher activity and lower selectivity compared with NiCu samples. The selectivity of the process was not less than 99.5% for all catalysts even at the high temperatures. At the same time, the improved activity of the catalyst also results in an increase in carbon monoxide formation while the hydrogen selectivity decreases. The optimal characteristics, such as rather high hydrogen yield, good selectivity and stability were shown by the catalyst with Ce0·1Zr0·9O2-δ support.

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Facilitated transport of ethylene through the polyethylene-graft-sulfonated polystyrene membranes. The role of humidity

2018 · ARTICLE · en

The possibility of ethane/ethylene mixture separation at the passing these gases through polyethylene-graft-sulfonated polystyrene membranes in silver and hydrogen forms has been shown. The results showed that the permeability of ethylene and the value of the separation coefficient increased significantly with increasing relative humidity of the separated gases. It was concluded that in both cases the transfer of ethylene occured in the form of a positively charged complex. The patterns of change in the permeability and separation factor were explained on the basis of the structure of the initial membranes and the solubility of the separated gases in the “phases” forming the membrane.

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LiFe1-XMgXPO4/C as cathode materials for lithium-ion batteries

2018 · ARTICLE · en

A cathode nanomaterial LiFe0.8Mg0.2PO4 with olivine structure was synthesized by the sol-gel method and studied using X-ray diffraction analysis, scanning electron microscopy, Mössbauer spectroscopy and electrochemical testing under the operating conditions of a lithium-ion battery. It is demonstrated that the iron substitution with magnesium occurs in the studied material. Discharge capacity of LiFe0.8Mg0.2PO4/С is 127 mAh g−1 at a current of 20 mA g−1 and is close to the theoretical value for the considered composition. It is determined utilizing Mössbauer spectroscopy that at the early stage of the LiFe0.8Mg0.2PO4charging process nanoscale regions are formed, having a FePO4 structure and an enhanced solubility of divalent iron ions.

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Ethane oxidative dehydrogenation to ethylene in a membrane reactor with asymmetric ceramic membranes

2018 · ARTICLE · en

The process of oxidative dehydrogenation of ethane (ODE) was carried out in a catalytic membrane reactor-distributor on a Mo-V-Te-Ox catalyst supported on asymmetric ceramic membranes. The obtained results show the obvious advantages of ODE with the use of a membrane system. Application of the membrane approach allows us to use initial gas mixtures with the O2:C2H6 ratios that are unacceptable for safety reasons in conventional reactors. Under optimal process conditions, the conversion of ethane of 70% can be achieved in a membrane reactor while maintaining the ethylene selectivity in the range of 95–98%.

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Conversion of aliphatic C1-C2 alcohols on In-, Nb-, Mo-doped complex lithium phosphates and HZr2(PO4)3 with NASICON-type structure

2018 · ARTICLE · en

In, Nb, Mo-doped lithium complex phosphates and HZr2(PO4)3 with NASICON-type structure were synthesized in this paper. Particle size distribution lies between 50 and 300 nm. The obtained samples were characterized by X-ray diffraction analysis, scanning electron microscopy and X-ray microanalysis. Investigation of the catalytic properties of synthesized compounds in the C1C2 alcohols conversions showed that heterovalent doping has a determining effect on the obtained catalysts' activity and selectivity. It is shown that the thermodynamic factors and the dopant ability to change the degree of oxidation and acid function of the catalysts play a key role in methanol and ethanol conversion. A number of catalysts show the high activity and selectivity of the formation of dimethyl and diethyl ethers and ethylene. High selectivity for C4 hydrocarbons is achieved by LiZr2(PO4)3 and Li0.5Zr2P2.5Mo0.5O12 catalysts (64 and 49%, respectively) in the case of ethanol conversion.

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An approach to increase the permselectivity and mono-valent ion selectivity of cation-exchange membranes by introduction of amorphous zirconium phosphate nanoparticles

2018 · ARTICLE · en

This paper addresses hybrid ion exchange membranes fabricated by the synthesis of amorphous zirconium phosphate (dopant contents from 0.5 to 24 wt%) directly in the pore and channel system of heterogeneous cation-exchange membrane RALEX® CM (by in situ technique). The incorporation of zirconium phosphate nanoparticles into the membrane system of pores and channels leads to the displacement of the pore water. As a result, the cation transport numbers increase. The hybrid materials thus obtained are characterized by increased ionic resistance and enhanced monovalent ion selectivity. The former effect was eliminated by fabrication of a surface-modified membrane. The relative simplicity of modification, together with the benefits of the hybrid materials make them promising for some membrane processes. Using 31P MAS NMR and elemental analysis, considerable difference between the zirconium phosphate composition inside and outside the membrane was found.

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Potentiometric sensors arrays based on perfluorinated membranes and silica nanoparticles with surface modified by proton-acceptor groups, for the determination of aspartic and glutamic amino acids anions and potassium cations

2018 · ARTICLE · en

Hybrid materials based on perfluorosulfonic cation-exchange membranes and silica nanoparticles with surface modified by nitrogen-containing groups have been obtained. The influence of concentration, size and proton acceptor ability of modifying groups on the oxide surface onto the response stability and sensitivity of potentiomentric sensors in aspartic and glutamic acid solutions with pH 4–9 has been investigated. A correlation between sensor cross-sensitivity to cations and anions in test solutions and membrane diffusion permeability is revealed. Optimal membrane compositions for arrays of cross-sensitive sensors have been chosen. Proposed sensors allow to carry out a simultaneous determination of potassium cations and amino acid anions in test solutions with concentrations ranged from 1.0·10−4 to 1.0·10−2 M, with an error

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Conductivity of Nafion-117 membranes intercalated by polar aprotonic solvents

2018 · ARTICLE · en

The Nafion-117 membranes in the Li+ form with pore-intercalated aprotonic organic solvents were prepared. The prepared materials were characterized by IR, impedance, and 7Li NMR spectroscopy. The solvent uptake of the membranes is shown to be controlled by the composition of organic solvents and their mixtures as well as by the conditions of the preliminary treatment of the initial membranes. For the Nafion-117 membrane, the degree of solvation can be improved by the preliminary treatment with alcohols, especially by the thermal treatment in methanol. Conductivity of the membranes is shown to increase with increasing content of the sorbed solvents. The best conductivity at 25 °C (2.5 × 10−3 and 1.6 × 10−3 S cm−1) was attained for the electrolytes based on the Nafion-117 membrane in lithium form with sorbed ethylene carbonate-propylene carbonate and ethylene carbonate-dimethoxyethane mixtures, respectively.

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Solvation and sodium conductivity of nonaqueous polymer electrolytes based on Nafion-117 membranes and polar aprotic solvents

2018 · ARTICLE · en

Nafion-117 membranes in the Na+-forms with pore-intercalated mixtures of aprotic organic solvents have been obtained. Dependences of solvent uptake of the membranes versustheir pretreatment conditions and compositions of initial organic solvent mixtures are described. Ionic conductivity of the obtained membranes in the temperature range −20–50 °С is investigated using impedance spectroscopy. It is demonstrated that ionic conductivity increases with increasing solvent uptake. The highest conductivities at 30 °С (~4 mS/cm) are obtained for the membranes thermally treated in methanol and aged in ethylene carbonate-dimethylacetamide, ethylene carbonate-diethyl carbonate-dimethylacetamide and propylene carbonate-dimethylacetamide-tetrahydrofuran mixtures. Thermal stability is studied by differential scanning calorimetry. It is shown that the membrane with intercalated propylene carbonate-dimethylacetamide-tetrahydrofuran mixture is characterized by a constant phase composition in a broad temperature range (up to −100 °С) and retention of high conductivity at low temperatures (~1 mS/cm at −20 °С).

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Permselectivity and ion-conductivity of grafted cation-exchange membranes based on UV-oxidized polymethylpenten and sulfonated polystyrene

2018 · ARTICLE · en

In the present study the properties of novel cation-exchange membranes based on UV-oxidized polymethylpentene (PMP) with grafted sulfonated polystyrene are described. A correlation between the composition of the grafted copolymer (grafting degree, cross-linking degree) and transport properties (Na+-conductivity, permselectivity, diffusion permeability) of resulted membranes are discussed. It is shown that with increasing of grafting degree (GD) and lowering of cross-linking degree (CD) the concentration of functional groups in the inner solution and permselectivity decrease, while ionic conductivity increases. The obtained membranes have the GD ranging from 29 to 120% and CD from 0 to 5%. The best membranes have ionic surface resistance of 0.3–0.6 Ω cm2 in 0.5 M NaCl, apparent cation transport numbers of 0.870–0.998 and NaCl diffusion permeability of 3.3 · 10−8–5.5 · 10−7 cm2 s−1, as well as satisfactory mechanical performance. A comparison of transport properties (conductivity and cation transport number) of the obtained membranes with a properties of number of available samples was made. It is noted that some of the obtained samples are at the level of the best perfluorinated homogeneous membranes in terms of the ratio of conductivity and cation transport numbers. High ionic conductivity and permselectivity make the prepared membranes promising candidates for possible applications in electrodialysis, dialysis, reverse electrodialysis, Red-Ox flow batteries and other membrane processes.

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Курсы (6)