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Calorimetry of electrode reaction under linear sweep-current polarization

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Abstract

The mathematical-physical equation concerning the process of calorimetry of electrode reactions was deduced, and the corresponding solutions were obtained respectively for the period of the electrochemical polarization and that of the natural cooling. The calorimetry of the anodic oxidation of ferrocyanide to ferricyanide under linear sweep-current polarization was carried out, the obtained apparent enthalpy change of the electrode reaction agreed well with that obtained by the calorimetry with constant currents. The developed calorimetry with linear sweep-current and the data processing method are applicable for quick determination of apparent enthalpy changes of electrode reactions.

Zusammenfassung

Es wurde die mathematisch-physikalische Gleichung für den Kalorimetrievorgang von Elektrodenreaktionen hergeleitet und die entsprechenden Lösungen für die Periode der elektrochemischen Polarisierung und für die des natürlichen Abkühlens erhalten. Die Kalorimetrie der anodischen Oxidation von Hexazyanoferrat(II) zu Hexazyanoferrat(III) bei linearer Kippstrompolarisierung wurde ausgeführt, die erhaltene scheinbare Enthalpieänderung der Elektrodenreaktion stimmte gut mit der bei der Kalorimetrie mit konstantem Strom überein. Die entwickelte Kalorimetrie bei linearem Kippstrom und die Datenauswertungsmethode können für eine schnelle Bestimmung der scheinbaren Enthalpieänderungen von Elektrodenreaktionen verwendet werden.

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Authors and Affiliations

  1. Department of Chemistry, Central South University of Technology, Changsha, 410083, Hunan, P. R. China

    Hengzhong Zhang, Pinming Zhang & Zheng Fang

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  1. Hengzhong Zhang
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  2. Pinming Zhang
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  3. Zheng Fang
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Zhang, H., Zhang, P. & Fang, Z. Calorimetry of electrode reaction under linear sweep-current polarization. Journal of Thermal Analysis 45, 151–156 (1995). https://doi.org/10.1007/BF02548674

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  • DOI: https://doi.org/10.1007/BF02548674

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