Polarographic investigation of the system Fe3+-H2O2-H2SO4

  • Yu. S. Milyavskii
  • S. A. Sinyakova
Physical Chemistry


  1. 1.

    The system Fe3+-H2O2-H2SO4 was investigated polarographically.

  2. 2.

    Exaltation of ires of H2O2 in acid medium on a dropping mercury electrode at +0.2 V (saturated calomel electrode) was detected for the first time for\(C_{H_2 O_2 }\)≥0.1 M.

  3. 3.

    The nature of the behavior of the catalytic current (k) with increasing\(C_{H_2 O_2 }\) does not depend upon the acidity (within the interval 0.01—.0 11 acid).

  4. 4.

    The activation energies, frequency factors, entropies of activation, and temperature coefficients of the process were calculated.

  5. 5.

    A hypothesis of the participation of the activated complex FeO2+[Fe2+(H2O)5O] in the mechanism was advanced on the basis of the Bakh peroxide theory, the theory of absolute reaction rates, and the experimental data.

  6. 6.

    A scheme of the process of appearance of iK of H2O2 with the participation of FeO2+ as the regenerating depolarizer, eliminating the contradiction of the existing mechanism, was proposed.



Experimental Data Entropy H2O2 Peroxide Mercury 
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Copyright information

© Consultants Bureau 1968

Authors and Affiliations

  • Yu. S. Milyavskii
    • 1
  • S. A. Sinyakova
    • 1
  1. 1.V. I. Vernadskii Institute of Geochemistry and Analytical ChemistryAcademy of Sciences of the USSRUSSR

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