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Correlations between the catalytic activity of heteropoly acids and the special features of their tunneling spectra

  • Russian Congress on Catalysis “Roskataliz”
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Abstract

The electronic-vibrational spectra of phosphomolybdic acid, a classic heteropoly acid with a Keggin anion, were measured in an ultrahigh vacuum with the use of scanning tunneling microscopy. The dependences of the resonance characteristics of the spectra, so-called negative differential resistances (NDRs), on the vacuum gap, the polarity of applied voltage, and the direction of tunnel current were determined. A new mechanism of the formation of NDRs was proposed based on the quantum effect of the localization of the electronic states of multicenter systems in strong electric fields. The character of correlations between NDRs and the catalytic properties of heteropoly acid catalysts was established.

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Authors and Affiliations

  1. Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119991, Russia

    F. I. Dalidchik, S. A. Kovalevskii, E. M. Balashov & B. A. Budanov

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  1. F. I. Dalidchik
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  2. S. A. Kovalevskii
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  3. E. M. Balashov
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  4. B. A. Budanov
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Correspondence to F. I. Dalidchik.

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Original Russian Text © F.I. Dalidchik, S.A. Kovalevskii, E.M. Balashov, B.A. Budanov, 2012, published in Kinetika i Kataliz, 2012, Vol. 53, No. 5, pp. 649–654.

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Dalidchik, F.I., Kovalevskii, S.A., Balashov, E.M. et al. Correlations between the catalytic activity of heteropoly acids and the special features of their tunneling spectra. Kinet Catal 53, 610–615 (2012). https://doi.org/10.1134/S0023158412050047

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  • DOI: https://doi.org/10.1134/S0023158412050047

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