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

Iva Betova; Martin Bojinov; Petri Kinnunen; Viivi Lehtovuori; Seppo Peltonen; Sami Penttilä; Timo Saario

doi:10.1016/j.elecom.2005.12.006

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 journal › Article › Scientific › peer-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 language	English
Pages (from-to)	311-316
Number of pages	6
Journal	Electrochemistry Communications
Volume	8
Issue number	2
DOIs	https://doi.org/10.1016/j.elecom.2005.12.006
Publication status	Published - 2006
MoE publication type	A1 Journal article-refereed

Keywords

nickel
oxidation
supercritical water
impedance spetroscopy
diffusion coefficient

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10.1016/j.elecom.2005.12.006

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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",

doi = "10.1016/j.elecom.2005.12.006",

language = "English",

volume = "8",

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journal = "Electrochemistry Communications",

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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

SN - 1388-2481

VL - 8

SP - 311

EP - 316

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 2

ER -

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

Abstract

Keywords

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