Electrochemistry of iron oxides

An in situ Mössbauer study

Cristian Fierro, Raúl E. Carbonio, Daniel Alberto Scherson, Ernest B. Yeager

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The electrochemical properties of Fe(OH)2 dispersed on high-area carbon in strongly alkaline media have been studied in situ by Mössbauer spectroscopy. The oxidation of this material was found to yield either an ensemble of small magnetite particles of different sizes or a mixture of superparamagnetic and bulklike magnetite crystals depending on whether the process was carried out by stepping or sweeping the potential to -0.3 V vs Hg/HgO,OH-, respectively. This provides clear evidence that the morphological characteristics of the resulting material are determined by the rate at which the oxidation reaction is performed. Further cathodic polarization to -1.2 V gave rise to the irreversible reduction of the Fe(OH)2 to metallic iron.

Original languageEnglish
Pages (from-to)6579-6581
Number of pages3
JournalJournal of physical chemistry
Volume91
Issue number27
Publication statusPublished - 1987 Dec 1
Externally publishedYes

Fingerprint

Ferrosoferric Oxide
Electrochemistry
Magnetite
electrochemistry
Iron oxides
iron oxides
magnetite
Oxidation
Cathodic polarization
oxidation
Electrochemical properties
Carbon
Iron
Spectroscopy
iron
Crystals
carbon
polarization
spectroscopy
crystals

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Fierro, C., Carbonio, R. E., Scherson, D. A., & Yeager, E. B. (1987). Electrochemistry of iron oxides: An in situ Mössbauer study. Journal of physical chemistry, 91(27), 6579-6581.

Electrochemistry of iron oxides : An in situ Mössbauer study. / Fierro, Cristian; Carbonio, Raúl E.; Scherson, Daniel Alberto; Yeager, Ernest B.

In: Journal of physical chemistry, Vol. 91, No. 27, 01.12.1987, p. 6579-6581.

Research output: Contribution to journalArticle

Fierro, C, Carbonio, RE, Scherson, DA & Yeager, EB 1987, 'Electrochemistry of iron oxides: An in situ Mössbauer study', Journal of physical chemistry, vol. 91, no. 27, pp. 6579-6581.
Fierro, Cristian ; Carbonio, Raúl E. ; Scherson, Daniel Alberto ; Yeager, Ernest B. / Electrochemistry of iron oxides : An in situ Mössbauer study. In: Journal of physical chemistry. 1987 ; Vol. 91, No. 27. pp. 6579-6581.
@article{7a26376fed914d898d2cbdb695109766,
title = "Electrochemistry of iron oxides: An in situ M{\"o}ssbauer study",
abstract = "The electrochemical properties of Fe(OH)2 dispersed on high-area carbon in strongly alkaline media have been studied in situ by M{\"o}ssbauer spectroscopy. The oxidation of this material was found to yield either an ensemble of small magnetite particles of different sizes or a mixture of superparamagnetic and bulklike magnetite crystals depending on whether the process was carried out by stepping or sweeping the potential to -0.3 V vs Hg/HgO,OH-, respectively. This provides clear evidence that the morphological characteristics of the resulting material are determined by the rate at which the oxidation reaction is performed. Further cathodic polarization to -1.2 V gave rise to the irreversible reduction of the Fe(OH)2 to metallic iron.",
author = "Cristian Fierro and Carbonio, {Ra{\'u}l E.} and Scherson, {Daniel Alberto} and Yeager, {Ernest B.}",
year = "1987",
month = "12",
day = "1",
language = "English",
volume = "91",
pages = "6579--6581",
journal = "Journal of Physical Chemistry",
issn = "0022-3654",
publisher = "American Chemical Society",
number = "27",

}

TY - JOUR

T1 - Electrochemistry of iron oxides

T2 - An in situ Mössbauer study

AU - Fierro, Cristian

AU - Carbonio, Raúl E.

AU - Scherson, Daniel Alberto

AU - Yeager, Ernest B.

PY - 1987/12/1

Y1 - 1987/12/1

N2 - The electrochemical properties of Fe(OH)2 dispersed on high-area carbon in strongly alkaline media have been studied in situ by Mössbauer spectroscopy. The oxidation of this material was found to yield either an ensemble of small magnetite particles of different sizes or a mixture of superparamagnetic and bulklike magnetite crystals depending on whether the process was carried out by stepping or sweeping the potential to -0.3 V vs Hg/HgO,OH-, respectively. This provides clear evidence that the morphological characteristics of the resulting material are determined by the rate at which the oxidation reaction is performed. Further cathodic polarization to -1.2 V gave rise to the irreversible reduction of the Fe(OH)2 to metallic iron.

AB - The electrochemical properties of Fe(OH)2 dispersed on high-area carbon in strongly alkaline media have been studied in situ by Mössbauer spectroscopy. The oxidation of this material was found to yield either an ensemble of small magnetite particles of different sizes or a mixture of superparamagnetic and bulklike magnetite crystals depending on whether the process was carried out by stepping or sweeping the potential to -0.3 V vs Hg/HgO,OH-, respectively. This provides clear evidence that the morphological characteristics of the resulting material are determined by the rate at which the oxidation reaction is performed. Further cathodic polarization to -1.2 V gave rise to the irreversible reduction of the Fe(OH)2 to metallic iron.

UR - http://www.scopus.com/inward/record.url?scp=33845281664&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33845281664&partnerID=8YFLogxK

M3 - Article

VL - 91

SP - 6579

EP - 6581

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

SN - 0022-3654

IS - 27

ER -