Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte - Publikacja - MOST Wiedzy

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Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte

Abstrakt

The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the solid electrolyte. The impact of temperature (700–850 °C) and H2S concentration (0–1 v/v%) in steam-rich atmospheres (90 v/v% H2O) on the overall cell performance was thoroughly assessed by means of electrochemical impedance spectroscopy (EIS) studies. The performance of the Co3O4/CeO2 electrode was significantly enhanced by increasing the H2S concentration and temperature. The obtained results were interpreted on the basis of EIS results and physicochemical characterization (XRD, SEM) studies of fresh and used electrodes. Notably, it was found that the mass transport processes, mainly associated with the adsorption and diffusion of the intermediate species resulting by the chemical and half-cell reactions taking place during cell operation, dominate the electrode polarization resistance compared with the charge transfer processes. Upon increasing temperature and H2S concentration, the electrode resistance is substantially lowered, due to the in situ activation and morphological modifications of the electrode, induced by its interaction with the reactants (H2S/H2O) and products (H2/SO2) mixtures.

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Autorzy (7)

  • Zdjęcie użytkownika Tzouliana Kraia

    Tzouliana Kraia

    • University of Western Macedonia, Kozani, Greece Department of Mechanical Engineering,
  • Zdjęcie użytkownika dr inż. Sebastian Lech Wachowski

    Sebastian Lech Wachowski dr inż.

  • Zdjęcie użytkownika Dr Einar Vollestad

    Einar Vollestad Dr

    • University of Oslo Department of Chemistry, Centre for Materials Science and Nanotechnology
  • Zdjęcie użytkownika Dr Ragnar Strandbakke

    Ragnar Strandbakke Dr

    • University of Oslo Department of Chemistry, Centre for Materials Science and Nanotechnology
  • Zdjęcie użytkownika Dr M Konsolakis

    M Konsolakis Dr

    • Technical University of Crete, Chania, Greece School of Production Engineering and Management,
  • Zdjęcie użytkownika Dr Truls Norby

    Truls Norby Dr

    • University of Oslo Department of Chemistry, Centre for Materials Science and Nanotechnology
  • Zdjęcie użytkownika Dr G.e. Marnellos

    G.e. Marnellos Dr

    • University of Western Macedonia, Kozani, Greece Department of Mechanical Engineering

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Licencja
Creative Commons: CC-BY-NC-ND otwiera się w nowej karcie

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
SOLID STATE IONICS nr 306, strony 31 - 37,
ISSN: 0167-2738
Język:
angielski
Rok wydania:
2017
Opis bibliograficzny:
Kraia T., Wachowski S., Vollestad E., Strandbakke R., Konsolakis M., Norby T., Marnellos G.: Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte// SOLID STATE IONICS. -Vol. 306, (2017), s.31-37
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.ssi.2017.04.010
Bibliografia: test
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Weryfikacja:
Politechnika Gdańska

wyświetlono 126 razy

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