Electrocatalysis of oxygen reduction reaction on mesoporous TiO2, In2O3 and TiO2 – In2O3 films

Authors

  • Hanna M. Maltanava Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieningradskaja Street, Minsk 220006, Belarus
  • Tatiana V. Gaevskaya Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieningradskaja Street, Minsk 220006, Belarus
  • Anna Yu. Kurenkova Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 Akademika Lavrentjeva Avenue, Novosibirsk 630090, Russia
  • Andrey A. Saraev Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 Akademika Lavrentjeva Avenue, Novosibirsk 630090, Russia
  • Sergey K. Poznyak Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieningradskaja Street, Minsk 220006, Belarus

Keywords:

titanium dioxide, indium(III) oxide, composite, film, electrocatalysis, oxygen reduction
Supporting Agencies
This work was carried out within the framework of the state programme of scientific research «Chemical processes, reagents and technologies, bioregulators and bioorganic chemistry» for 2021–2025 (research work 2.1.04.02). The authors express their gratitude to O. V. Korolik for her assistance with the research.

Abstract

Films of individual oxides TiO2, In2O3 and TiO2 – In2O3 composites have been obtained from sols via spin-coating technique with subsequent annealing at 200 and 450 °C. Using scanning electron microscopy, transmission electron microscopy and Raman spectroscopy, it was established that the samples after annealing have a mesoporous structure with a disordered pore distribution and consist of TiO2 and In2O3 nanocrystallites 5–15 nm in size. During the study of the electrochemical activity of the obtained films in the oxygen reduction reaction in an alkaline medium using the cyclic voltammetry method, it was revealed that the efficiency of the oxygen reduction reaction on TiO2, In2O3 and TiO2 – In2O3 electrodes is determined by the nature of the oxide, the TiO2 and In2O3 ratio in composite systems, as well as the film surface condition and the size of the oxide nanocrystallites, which affect the transport of charge carriers from the substrate through the oxide layer to the adsorbed reagents from the solution.

Author Biographies

  • Hanna M. Maltanava, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieningradskaja Street, Minsk 220006, Belarus

    PhD (chemistry), docent; senior researcher at the laboratory of thin films chemistry

  • Tatiana V. Gaevskaya, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieningradskaja Street, Minsk 220006, Belarus

    PhD (chemistry), docent; head of the laboratory of thin films chemistry

  • Anna Yu. Kurenkova, Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 Akademika Lavrentjeva Avenue, Novosibirsk 630090, Russia

    PhD (chemistry); researcher at the department of heterogeneous catalysis

  • Andrey A. Saraev, Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 Akademika Lavrentjeva Avenue, Novosibirsk 630090, Russia

    PhD (physics and mathematics); researcher at the department of catalysts study

  • Sergey K. Poznyak, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieningradskaja Street, Minsk 220006, Belarus
    PhD (chemistry), docent; leading researcher at the laboratory of thin films chemistry

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Published

2026-01-31

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No. 2 (2025): Journal of the Belarusian State University. Chemistry

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Original Articles

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How to Cite

[1]
Maltanava, H.M. et al. 2026. Electrocatalysis of oxygen reduction reaction on mesoporous TiO2, In2O3 and TiO2 – In2O3 films. Journal of the Belarusian State University. Chemistry. 2 (Jan. 2026), 33–39. DOI:https://doi.org/10.33581/2520-257X-2025-2-%p.