Electrochemistry of iron oxides: An in situ Mössbauer study

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

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)6579-6581
ページ数3
ジャーナルJournal of physical chemistry
91
27
出版ステータスPublished - 1987 12 1
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学

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