Examining the influence of electrosynthesis conditions on the composition of tin-oxide catalyst

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.110000

Keywords:

electrosynthesis, tin dioxide, tin electrode, catalytic activity, composition of oxide mixture

Abstract

Tin dioxide can serve as an active material in micro- and optoelectronics, energy generation, and catalysis. Its synthesis method is determined by the scope of its application. We established regularities in the electrochemical synthesis of a catalytically-active oxide mixture on the surface of tin in alkaline solutions. By employing the original coulometric method we determined quantitative composition of the electrochemically-obtained oxide films in a wide range of formation potentials. At an electrode potential of ‒0.3, the molar ratio of Sn(II)/Sn(IV) is equal to unity. Based on the analysis of processes that might occur under the specified conditions of electrosynthesis, it can be assumed that the surface of tin is coated with a thin layer of SnSnO3.

Amorphous nature of the electrode surface, passivated at ‒0.3 V, indirectly confirms this assumption. At a potential of 3.0 V, the oxide film’s content of Sn(IV) is 59 % (mol), Sn(II) ‒ 41 % (mol). Consequently, the film contains 18 % (mol) of SN(IV), which is not included in the composition of SnSnO3. In other words, active tin dioxide is formed exactly at such a potential. Catalytic activity of the obtained materials is demonstrated on the example of methyl tert-butyl ether electrooxidation. The starting concentration of MTBE on the tin electrode, oxidized at 3.0 V, is reduced by 98 % within 180 minutes, while only 73 % of MTBE is decomposed over the same time on a nickel electrode. 

Author Biographies

Victor Vargalyuk, Oles Honchar Dnipro National University Gagarina ave., 72, Dnipro, Ukraine, 49010

Doctor of Chemical Sciences, Professor

Department of Physical and Inorganic Chemistry

Kateryna Plyasovskaya, Oles Honchar Dnipro National University Gagarina ave., 72, Dnipro, Ukraine, 49010

PhD, Associate Professor

Department of Physical and Inorganic Chemistry

Irina Sknar, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Associate Professor

Department of Processes, Devices and General Chemical Technology

Anna Cheremysinova, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Associate Professor

Department of Processes, Apparatus and General Chemical Technology

Oleksii Sigunov, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Associate Professor

Department of Chemical Technology of Astringent Materials

Olga Sverdlikovska, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Associate Professor

Department of Processing polymers and photo-, nano -, and polygraphic materials

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Published

2017-10-30

How to Cite

Vargalyuk, V., Plyasovskaya, K., Sknar, I., Cheremysinova, A., Sigunov, O., & Sverdlikovska, O. (2017). Examining the influence of electrosynthesis conditions on the composition of tin-oxide catalyst. Eastern-European Journal of Enterprise Technologies, 5(6 (89), 29–34. https://doi.org/10.15587/1729-4061.2017.110000

Issue

Vol. 5 No. 6 (89) (2017): TECHNOLOGY ORGANIC AND INORGANIC SUBSTANCES

Section

Technology organic and inorganic substances

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Copyright (c) 2017 Victor Vargalyuk, Kateryna Plyasovskaya, Irina Sknar, Anna Cheremysinova, Oleksii Sigunov, Olga Sverdlikovska

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