Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
164 0 |
SM ISO690:2012 POVAR, Igor, SPINU, Oxana. Ruthenium redox equilibria 2. Thermodynamic analysis of disproportionation and comproportionation conditions. In: Journal of Electrochemical Science and Engineering, 2016, nr. 1(6), pp. 135-143. ISSN 1847-9286. DOI: https://doi.org/10.5599/jese.228 |
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Journal of Electrochemical Science and Engineering | ||||||
Numărul 1(6) / 2016 / ISSN 1847-9286 | ||||||
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DOI:https://doi.org/10.5599/jese.228 | ||||||
Pag. 135-143 | ||||||
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The key property of Frost diagram has been confirmed using thermodynamic and linear algebra methods. On the basis of the thermodynamic data, the areas of thermodynamic stability of ruthenium species of different valence states as a function of pH for each degree of oxidation have been determined. Subsequently, based on the diagrams calculated for several values of pH, a narrow ΔpH value is determined, in which the dismutation of appropriate form takes place. Based on thermodynamic analysis, the exact value of the beginning of disproportionation (or comproportionation) is found. Finally, the developed revised Frost diagrams of ruthenium heterogeneous chemical and redox equilibria, as a function of pH and the total concentration of metal ion in solution, have been built. |
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Cuvinte-cheie Disproportionation and comproportionation equilibria, Reduced Gibbs energy of half reaction of oxidation, Revised Frost diagram, Ruthenium soluble and insoluble species |
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