GIBBS FREE ENERGIES OF FORMATION OF RUO2, IRO2, AND OSO2: A HIGH-TEMPERATURE ELECTROCHEMICAL AND CALORIMETRIC STUDY
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dc.contributor.author | O'Neill H.St.C. | |
dc.contributor.author | Nell J. | |
dc.date.accessioned | 2020-12-12T05:11:24Z | |
dc.date.available | 2020-12-12T05:11:24Z | |
dc.date.issued | 1997 | |
dc.identifier | https://elibrary.ru/item.asp?id=31676070 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1997, , 24, 5279-5293 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/20618 | |
dc.description.abstract | The Gibbs free energies of formation of RuO2, OsO2 and IrO2 have been determined by measuring the chemical potentials of oxygen (μO2) defined by the reactions M + O2 = MO2, where M = Ru, Os. or Ir, using an electrochemical method with calcia-stabilized zirconia (CSZ) solid electrolytes. Measurements were attempted in the temperature ranges from ∼870 K to 1620, 1270, and 1415 K for the Ru, Os, and Ir equilibria, respectively, but inspection of the results reveals that equilibrium could not be established below ∼930 K for all three reactions. For Ru + RuO2, the highest temperature data (above 1520 K) may be systematically affected by the onset of significant electronic conduction in the CSZ electrolyte, while the attempted measurements of the Os + OsO2 equilibrium above 1190 K are obscured by the disproportionation of OsO2 to gaseous Os oxides. | |
dc.title | GIBBS FREE ENERGIES OF FORMATION OF RUO2, IRO2, AND OSO2: A HIGH-TEMPERATURE ELECTROCHEMICAL AND CALORIMETRIC STUDY | |
dc.type | Статья |
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