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Electrochemical properties and state of paramagnetic centers in copper-modified complex vanadium and titanium oxides

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Abstract

Complex vanadium and titanium oxides modified by copper ions are studied by the electrochemical and ESR methods. Oxides Cu x V2−y Ti y O5−δ·nH2O (0<y<1.33) have a layered structure and oxides Cu x Ti1−y V y O5+δ·nH2O (0<y<0.25), an anatase structure. The intercalation of cations Cu2+ into the hydrates leads to oxidation of V4+. According to ESR data, V4+ exists in the oxides in the form of VO2+ and an octahedral surround of oxygen (V4+−O6), respectively. The electroreduction of ions of d-elements and chemisorbed oxygen in the oxides is analyzed. The intercalation of cations Cu2+ alters the content of V4+ and the chemisorption ability of the oxides. Possible reasons for this phenomenon are discussed.

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Authors and Affiliations

  1. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, ul. Pervomaiskaya 91, Yekaterinburg, 620219, Russia

    G. S. Zakharova, L. Yu. Buldakova & V. L. Volkov

  2. Ural State University of Forestry Engineering, Yekaterinburg, Russia

    L. S. Molochnikov & E. G. Kovaleva

Authors
  1. G. S. Zakharova
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  2. L. Yu. Buldakova
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  3. V. L. Volkov
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  4. L. S. Molochnikov
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  5. E. G. Kovaleva
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Correspondence to V. L. Volkov.

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Original Russian Text © G.S. Zakharova, L.Yu. Buldakova, V.L. Volkov, L.S. Molochnikov, E.G. Kovaleva, 2006, published in Elektrokhiniya, 2006, Vol. 42, No. 1, pp. 61–67.

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Zakharova, G.S., Buldakova, L.Y., Volkov, V.L. et al. Electrochemical properties and state of paramagnetic centers in copper-modified complex vanadium and titanium oxides. Russ J Electrochem 42, 53–58 (2006). https://doi.org/10.1134/S1023193506010095

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  • DOI: https://doi.org/10.1134/S1023193506010095

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