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Electrochemical Properties of Electrode Materials Based on Pr5Mo3O16 + δ

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Abstract

The electrochemical activity of electrode materials based on Pr5Mo3O16 + δ (РМО), and applied on the surface of Ce0.9Gd0.1O1.95 (GDC) solid electrolyte is studied in the temperature range from 873 to 1173 K under oxidative (air) and reductive (Ar/H2) conditions. The polarization resistance (Rη) at 1073 K is found to be 8.8 and 4.8 Ω cm2 in air and in the reductive atmosphere, respectively. With the aim of enhancing the electrochemical activity of РМО in the oxygen reduction reaction, the electrochemical properties of PМО–xGDC and PМО–xPr6O11 composite electrodes are studied in air. The PМО–xPr6O11 composites are shown to be the best choice from the viewpoint of attaining the high electrochemical efficiency. When going from single-phase РМО to the PMO–xPr6O11 composite, a considerable decrease in Rη is observed (by an order of magnitude for х = 50 wt % Pr6O11, i.e., to 0.6 Ω cm2 at 1073 K in air). The data obtained here show that PMO can serve as the basis in elaborating the electrode material for symmetrical solid-oxide fuel cells.

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Funding

This study was supported by the Russian Scientific Foundation (grant no. 16-13-10327). The electrochemical measurements were carried out in the frames of the State Project no. 0089-2019-0007 and, partially, by the Russian Foundation for Basic Research (grant no. 17-08-00831).

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Authors and Affiliations

  1. NTI Competence Center, Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    N. V. Lyskov

  2. Moscow State University, Faculty of Chemistry, Leninskie Gory, 119992, Moscow, Russia

    A. I. Kotova, S. Ya. Istomin, G. N. Mazo & E. V. Antipov

Authors
  1. N. V. Lyskov
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  2. A. I. Kotova
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  3. S. Ya. Istomin
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  4. G. N. Mazo
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  5. E. V. Antipov
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Correspondence to N. V. Lyskov.

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The author declare the absence of any conflict of interests.

Additional information

Translated by T. Safonova

Published on the basis of materials of the 5th All-Russia Conference “Fuel Cells and Power Plants Based on Them” (with international participation), Suzdal, 2018.

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Lyskov, N.V., Kotova, A.I., Istomin, S.Y. et al. Electrochemical Properties of Electrode Materials Based on Pr5Mo3O16 + δ. Russ J Electrochem 56, 93–99 (2020). https://doi.org/10.1134/S102319352002010X

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  • DOI: https://doi.org/10.1134/S102319352002010X

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