In-situ characterisation of the oxidation of Ni in ultrasupercritical water

Iva Betova, Martin Bojinov (Corresponding Author), Petri Kinnunen, Viivi Lehtovuori, Seppo Peltonen, Sami Penttilä, Timo Saario

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)

    Abstract

    In the present paper, in situ electrical and electrochemical measurements during oxidation of pure Ni in ultrasupercritical water (500–600 °C) have been performed and analysed. The onset of oxidation was followed using contact electric resistance measurements. The impedance spectra of the Ni–Ni contact during oxidation could be quantitatively interpreted using general considerations of the corrosion process and the Mixed-Conduction Model for oxide films. Preliminary estimates of the diffusion coefficients of principal ionic and electronic current carriers have been obtained and their relevance with respect to available data on Ni oxidation is discussed.
    Original languageEnglish
    Pages (from-to)311-316
    Number of pages6
    JournalElectrochemistry Communications
    Volume8
    Issue number2
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Oxidation
    Water
    Electric resistance measurement
    Oxide films
    Corrosion

    Keywords

    • nickel
    • oxidation
    • supercritical water
    • impedance spetroscopy
    • diffusion coefficient

    Cite this

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    title = "In-situ characterisation of the oxidation of Ni in ultrasupercritical water",
    abstract = "In the present paper, in situ electrical and electrochemical measurements during oxidation of pure Ni in ultrasupercritical water (500–600 °C) have been performed and analysed. The onset of oxidation was followed using contact electric resistance measurements. The impedance spectra of the Ni–Ni contact during oxidation could be quantitatively interpreted using general considerations of the corrosion process and the Mixed-Conduction Model for oxide films. Preliminary estimates of the diffusion coefficients of principal ionic and electronic current carriers have been obtained and their relevance with respect to available data on Ni oxidation is discussed.",
    keywords = "nickel, oxidation, supercritical water, impedance spetroscopy, diffusion coefficient",
    author = "Iva Betova and Martin Bojinov and Petri Kinnunen and Viivi Lehtovuori and Seppo Peltonen and Sami Penttil{\"a} and Timo Saario",
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    year = "2006",
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    language = "English",
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    In-situ characterisation of the oxidation of Ni in ultrasupercritical water. / Betova, Iva; Bojinov, Martin (Corresponding Author); Kinnunen, Petri; Lehtovuori, Viivi; Peltonen, Seppo; Penttilä, Sami; Saario, Timo.

    In: Electrochemistry Communications, Vol. 8, No. 2, 2006, p. 311-316.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - In-situ characterisation of the oxidation of Ni in ultrasupercritical water

    AU - Betova, Iva

    AU - Bojinov, Martin

    AU - Kinnunen, Petri

    AU - Lehtovuori, Viivi

    AU - Peltonen, Seppo

    AU - Penttilä, Sami

    AU - Saario, Timo

    N1 - Project code: G3SU00208

    PY - 2006

    Y1 - 2006

    N2 - In the present paper, in situ electrical and electrochemical measurements during oxidation of pure Ni in ultrasupercritical water (500–600 °C) have been performed and analysed. The onset of oxidation was followed using contact electric resistance measurements. The impedance spectra of the Ni–Ni contact during oxidation could be quantitatively interpreted using general considerations of the corrosion process and the Mixed-Conduction Model for oxide films. Preliminary estimates of the diffusion coefficients of principal ionic and electronic current carriers have been obtained and their relevance with respect to available data on Ni oxidation is discussed.

    AB - In the present paper, in situ electrical and electrochemical measurements during oxidation of pure Ni in ultrasupercritical water (500–600 °C) have been performed and analysed. The onset of oxidation was followed using contact electric resistance measurements. The impedance spectra of the Ni–Ni contact during oxidation could be quantitatively interpreted using general considerations of the corrosion process and the Mixed-Conduction Model for oxide films. Preliminary estimates of the diffusion coefficients of principal ionic and electronic current carriers have been obtained and their relevance with respect to available data on Ni oxidation is discussed.

    KW - nickel

    KW - oxidation

    KW - supercritical water

    KW - impedance spetroscopy

    KW - diffusion coefficient

    U2 - 10.1016/j.elecom.2005.12.006

    DO - 10.1016/j.elecom.2005.12.006

    M3 - Article

    VL - 8

    SP - 311

    EP - 316

    JO - Electrochemistry Communications

    JF - Electrochemistry Communications

    SN - 1388-2481

    IS - 2

    ER -