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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)

Cation-exchange membranes with sulfonylimide groups showing a high ionic conductivity in water/organic amide mixed systems

2020 · ARTICLE · en

Cation-exchange membranes based on polystyrene block-copolymer with phenylsulfonylimide ionogenic groups in the Na+-form show conductivities up to 0.2 mS cm−1 in organic amides such as N-methylpyrrolidone and N,N-dimemylacetamide. These values are 2-2.5 orders of magnitude higher compared to those of conventional sulfonated cation-exchange membranes. A strong dependence of solvation degree and ionic conductivity on dielectric permittivity, chemical structure, and composition of the solvent, as well as on the nature of the membrane functional group, was noted and discussed. Further, based on the dependence of membrane’s solvation on the dimethylacetamide or acetonitrile content in the water/organic solvent mixtures and thermodynamic properties of these solvent mixtures the reasons for the difference in ionic conductivity with a variation in the composition of the solvent and the functional groups of membranes are described. It was shown that conductivity of the cation-exchange membranes can increase dramatically even at low water concentration in the acetonitrile solution. It was demonstrated that the membranes with phenylsulfonylimide groups have high ionic conductivity in water/dimethylacetamide mixtures of any concentrations, which opens new prospects for their applications in electrochemical desalination and metal-ion batteries.

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High pressure synthesis and transport properties of a perfluorinated sulfocationic exchange membrane

2020 · ARTICLE · en

A new perfluorinated sulfocationic polymer and a membrane based thereon have been produced using the thermally initiated high-pressure polymerization. The proton conductivity of obtained material is higher than that of commercial Nafion membranes and reaches 57 mS cm−1 at 21 C and 114 mS cm−1 at 79 C.

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The transformation and degradation of Nafion® solutions under ultrasonic treatment. The effect on transport and mechanical properties of the resultant membranes

2020 · ARTICLE · en

This work addresses the study of the effect of ultrasonic (US) treatment on the properties of alcohol solutions of perfluorinated sulfonic acid polymer Nafion® and cast membranes. The effect of the duration of US treatment on the physico-chemical properties (water uptake, transport and mechanical properties) of the resulted membranes is described for the first time. Upon the US treatment, viscosity of the polymer solutions irreversibly decreases due to deagglomeration and rupture of macromolecular chains. As a result of the US treatment, mechanical properties of the Nafion® membranes are deteriorated. The dependences of water uptake and conductivity of the Nafion® membranes in the proton form on sonication time pass the maximum (at 30–45 min). Due to the sonication of polymer solutions, proton conductivity of the membranes increases by 40–45%. Upon extended sonication, the content of sulfonic acid groups decreases, and carboxyl groups are formed at the ends of macromolecules. Thus, water uptake of the membranes prepared from the polymer solutions after the US treatment for 60 min decreases, and conductivity of the obtained membranes in the H+-form is reduced. However, for the Nafion® membranes in the Na+-form, as the duration of the US treatment is extended, their conductivity and diffusion permeability tend to increase due to the enhanced connectivity of pores and channels as well as due to the participation of carboxyl groups in the ionic transport. Upon extended sonication, selectivity of the cation transfer through the membranes is reduced. The results of this work highlight the importance of the proper selection of favorable conditions of the US treatment of the solutions of perfluorinated sulfonic acid polymers for the preparation of hybrid membranes and for the development of catalytic layers of membrane-electrode assemblies for fuel cells.

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Dependence of the Transport Properties of Perfluorinated Sulfonated Cation-Exchange Membranes on Ion-Exchange Capacity

2020 · ARTICLE · en

The transport properties of ion-exchange membranes depend on many factors, primarily, on ion-exchange capacity and chemical composition. Therefore, the correlation of transport properties with a single particular parameter is generally not quite strict. In this study, the dependence of transport properties of several perfluorinated sulfonated cation-exchange membranes that differ in side chain length and fraction of fragments containing ether groups on ion-exchange capacity is analyzed. It is shown that, with a decrease in the ion-exchange capacity from 1.35 to 0.66 mg-equiv/g, the proton conductivity of membranes contacting water and their diffusion permeability with respect to a 0.1 M HCl solution decrease by two orders of magnitude. A decrease in relative humidity leads to the most significant decrease in the conductivity of membranes with a low ion-exchange capacity. Thus, at a relative humidity of 32%, the conductivity of the studied membranes decreases more than 600-fold with a decrease in ion-exchange capacity. In general, the oxygen permeability of membranes is characterized by a similar dependence. However, in this set of membranes, it varies as little as threefold.

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The Effect of the Cation-Exchange Membranes MK-40 Modification by Perfluorinated Sulfopolymer and Ceria on Their Transport Properties

2020 · ARTICLE · en

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+

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Properties of ceria nanoparticles with surface modified by acidic groups

2020 · ARTICLE · en

The effect of the precursor and surface modification by sulfate and phosphate groups on the properties of cerium oxide was studied. The obtained materials were characterized by infrared (IR) and Raman spectroscopy, X-ray powder diffraction, scanning electron microscopy (SEM), high resolution transmission electron microscopy (TEM), thermogravimetric analysis (TGA) with the gas phase composition analysis, Brunauer–Emmett–Teller (BET) method, and impedance spectroscopy. The significant fraction of Се3+ ions at the surface of cerium oxide particles obtained from Ce(NO3)3 promotes the formation of double sodium cerium sulfate and cerium phosphate upon treatment with solutions of sodium hydrogen sulfate and sodium dihydrogen phosphate, respectively. The modification of ceria surface by sulfate groups leads to a decrease in specific surface area and water content of the obtained materials, as well as to a significant decrease in their proton conductivity. CeO2 samples prepared from cerium ammonium nitrate have a significantly smaller particle size and higher conductivity. Its value for cerium oxide modified with phosphate groups increases up to 3.5 × 10−4 S/cm at 65 °C. The effect of hydration degree as well as Ce^3+ content on the cerium oxides properties is discussed.

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Potentiometric Sensors Based on Nafion Membranes Modified by PEDOT for Determining Procaine, Lidocaine, and Bupivacaine in Aqueous Solutions and Pharmaceuticals

2020 · ARTICLE · en

Hybrid materials based on perfluorinated sulfonic acid Nafion-type membranes and poly-3,4-ethylenedioxythiophene (PEDOT) with a gradient distribution of the latter along the film length were synthesized by in situ oxidative polymerization. The initial monomer concentration (0.01 and 0.002 M) and the concentration ratio of the monomer to the oxidant (1/1.25 and 1/2.5) were varied. We studied the effect of the equilibrium and transport properties of the obtained materials on the characteristics of cross-sensitive DP-sensors (analytical signal is the Donnan potential) in aqueous solutions of procaine, lidocaine, and bupivacaine hydrochlorides, including those containing sodium chloride, in a concentration range from 1.0 × 10–4 to 1.0 × 10–2 M and pH from 2 to 6. The relative error in determining the active substance in the Novokain preparation using a DP-sensor based on the Nafion/PEDOT membrane (0.002 M, 1/2.5) was 0.4%. An array of DP-sensors based on Nafion and Nafion/PEDOT (0.002 M, 1/1.25) membranes was used to determine bupivacaine hydrochloride and sodium chloride in the Markain® Spinal preparation with an error of 11 and 6%, respectively.

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Effect of carbon and N-doped carbon nanomaterials on the electrochemical performance of lithium titanate-based composites

2020 · ARTICLE · en

The composite nanomaterials based on hydrothermally synthesized Li4Ti5O12 and carbon nanotubes (CNTs) or carbon nanoflakes, including N-doped ones were prepared. The composites were investigated by X-ray powder diffraction, TEM, SEM, Raman spectroscopy, BET, dcmeasurements, galvanostatic charge-discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy. Carbon nanomaterial addition provides the formation of a highly conductive 3D network leading to a significant increase in the electrical conductivity and excellent electrochemical performance of the composites at high charge-discharge rates. At a current density of 6400 mA/g (~37C), the reversible discharge capacities of Li4Ti5O12 and its composites with CNTs and N-doped CNTs are 60, 92, and 96 mAh/g, respectively. They exhibit a remarkable long-term cycling stability: less than 0.034%, 0.013% and 0.005% loss per cycle over 500 cycles, respectively. The results obtained by Raman spectroscopy, BET, and electrochemical measurements suggest the interaction between polar fragments of the N-doped carbon nanomaterials and Li4Ti5O12 surface.

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Potentiometric multisensory system based on perfluorosulfonic acid membranes and carbon nanotubes for sulfacetamide determination in pharmaceuticals

2020 · ARTICLE · en

Hybrid materials based on perfluorinated sulfonic acid (PFSA) Nafion®-type membranes with homogeneous and with a gradient distribution of multiwalled carbon nanotubes (CNTs) along the sample were obtained. The studies of water uptake, ionic conductivity, and diffusion permeability of the materials were performed. Hybrid membranes were used to create potentiometric Donnan potential (DP) sensors. The influence of the CNTs concentration on the performance of the sensors in aqueous solutions containing sulfacetamide anions and alkali metal cations was studied. The dependences of the cross-sensitivity of DP sensors to anions and cations on the diffusion permeability of the hybrid membranes were established. A potentiometric multisensory system was developed for the simultaneous determination of sulfacetamide anions and potassium (or sodium) cations at concentrations range from 1.0·10−4 to 1.0·10−2 M and рН from 5 to 8. The advantages of the system are the following: the response time of the system is less than 1 min, the analysis does not require sample preparation, and the characteristics of the sensors persist for at least 1 year. An array of cross-sensitive DP-sensors based on PFSA Nafion®-type membranes, containing 1.0 and 1.5 wt% CNTs, was used to determine the active component in the drug “Sulfacyl sodium (Albucide)” (eye drops). The accuracy of the determination is 94–95%.

Study of Delithiation Process Features in LixFe0.8M0.2PO4 (M = Mg, Mn, Co, Ni) by Mössbauer Spectroscopy

2020 · ARTICLE · en

Studies of lithium iron phosphates doped with Mg, Mn, Co, and Ni were carried out at different stages of electrochemical charging using 57Fe Mössbauer spectroscopy. Multi-spectrum fitting method was used to analyze spectra measured at different temperatures. This made it possible to detect and characterize various local states of iron cations with different cationic environments. The feature of charging process that is caused by doping the samples is established. Doping of LiFePO4 leads to formation of a large interphase boundary between lithiated and delithiated regions where Fe2+ and Fe3+ cations coexist. Magnetic moments of divalent iron cations that are located near this boundary exhibit relaxation properties. Based on the obtained results, a new model of charge and discharge processes for doped samples was proposed explaining the increase of charge/discharge rate. Within the framework of this model, regions with increased and decreased concentrations of divalent ions are formed inside the particles of a cathode material during delithiation and lithiation respectively. The coexistence of Fe2+ and Fe3+ ions and, as a consequence, the formation of lithium defects at interphase boundaries determines the increase in electronic and ionic conductivity at interfaces and rapid diffusion of lithium ions in the samples.

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Курсы (6)