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Your search keyword '"Myasoedova, Tatiana"' showing total 26 results
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26 results on '"Myasoedova, Tatiana"'

8. Coherent Design of CoAl Layered Double Hydroxide-Derived Co3O4Cubes as a Competent Electrocatalyst for Water Splitting and Urea Electrolysis

Author

Kalusulingam, Rajathsing, Mariyaselvakumar, Mariyamuthu, Mathi, Selvam, Khubezhov, Soslan A., Pankov, Ilya V., Srinivasan, Kannan, Antonyraj, Churchil Angel, and Myasoedova, Tatiana N.

Abstract

Here, we studied the electrocatalytic activity of a CoAl-LDH-derived Co3O4cube, which has an amplified electrochemical surface area and conductivity, which in turn escalates the electrochemical performance. The cubic Co3O4promotes OER, HER, and UOR with significantly lower potentials of 1.51, 0.192, and 1.36 V at a 10 mA cm–2current density; this electrocatalytic performance addresses the kinetic challenges associated with electrolytic reactions in an effective manner. Moreover, we assembled a full-cell water electrolyzer employing the Co3O4cube//Co3O4cube as both the cathode and anode, achieving various current densities of 10, 20, 50, and 100 mA cm–2with corresponding cell voltages of 1.49, 1.72, 1.83, and 1.95 V. In addition, synthesized Co3O4cubes demonstrate excellent urea electrolytic performance, maintaining stable voltages of 1.40, 1.47, 1.57, and 1.70 V under similar current densities. Notably, the Co3O4cube electrocatalyst exhibited sustained stability over 24 h, maintaining a voltage of 1.72 V in alkaline 1.0 M KOH solution and 1.47 V in alkaline 1.0 M KOH + 0.5 M urea solution, showing a reduction of 275 mV compared to the overall water electrolyzer at a current density of 20 mA cm–2.

Published
2024
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12. Investigation of Adsorption Kinetics on the Surface of a Copper-Containing Silicon–Carbon Gas Sensor: Gas Identification.

Author

Plugotarenko, Nina K., Novikov, Sergey P., Myasoedova, Tatiana N., and Mikhailova, Tatiana S.

Subjects
GAS detectors, ADSORPTION kinetics, GENETIC algorithms, CARBON films, CARBON monoxide, NITROGEN dioxide
Abstract

The low selectivity of materials to gases of a similar nature may limit their use as sensors. Knowledge of the adsorption kinetic characteristics of each gas on the surface of the material may enable the ability to identify them. In this work, copper-containing silicon–carbon films were formed using electrochemical deposition on the Al2O3 substrate with interdigitated Cr/Cu/Cr electrodes. These films showed good adsorption characteristics with several different gases. The adsorption kinetics of nitrogen dioxide, sulfur dioxide, and carbon monoxide on the film surface were investigated by the change in the resistivity of the material. Pseudo-first-order and pseudo-second-order kinetics, Elovich, Ritchie, and Webber intraparticle diffusion models were applied. It was found that the largest approximation factor and the lowest Root-Mean-Square Error and Mean Bias Error for all three gases were for the Elovich model. The advantages of silicon–carbon copper-containing films for gas sensor applications were shown. An algorithm for gas recognition was proposed based on the dependence of the change in the resistivity of the material under stepwise gas exposure. It was found that parameters such as the values of the extrema of the first and second derivatives of the R vs. t dependence during adsorption and the slope of R vs. t dependence in the Elovich coordinates are responsible for gas identification among several one-nature gases. [ABSTRACT FROM AUTHOR]

Published
2023
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26. Properties of SiO2CuOx Films for Nitrogen Dioxide Detection

Author

Myasoedova, Tatiana, Yalovega, G.E., Petrov, V.V., Zabluda, O.V., Shmatko, V.A., and Funik, A.O.

Abstract

SiOxCuOy thin films were prepared by the deposition on to the Si/SiO2 substrates from the alcoholic solutions employing the sol-gel technique. The various analytic techniques were applied to characterize structure and properties of the films under study . The both X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies showed the presence CuO as well as CuO2 phases and formation of a dual-oxide CuSiO3 with the average crystallites sizes of 35-50 nm. The conductance of the films was rather sensitive to the presence of 1-20 ppm NO2 concentration at the operating temperatures in the range of 20–200 ◦C.

Published
2013
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