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

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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.",
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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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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 -