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In-situ Raman Spectroscopy for the Passive Oxide Film on Iron in Neutral Borate Solution

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Title: In-situ Raman Spectroscopy for the Passive Oxide Film on Iron in Neutral Borate Solution
Authors: Ohtsuka, Toshiaki Browse this author →KAKEN DB
Taneda, Kento Browse this author
Issue Date: 2009
Publisher: The Electrochemical Society
Journal Title: ECS Transactions
Volume: 16
Issue: 52
Start Page: 125
End Page: 131
Publisher DOI: 10.1149/1.3229961
Abstract: In-situ Raman spectra of the passive oxide film in neutral borate solution at pH 8.4 was measured without any enhancement such as surface enhanced Raman scattering or resonance Raman scattering. To measure the Raman spectra of the surface thin film on the electrode, we introduced a confocal collection system to reject the scattering signal from the electrolytes surrounding the surface in front of the spectrometer. The background signal is still high, and it is more intensive by 100 times than the Raman signal from the passive film. The difference Raman signal between the surfaces of the passivated iron and the reduced bare iron reveals a peak at about 670 cm-1. When we measured the passivated iron surface soon after transfer from the electrolytes to air, we observed another broad and faint peak at 320 cm-1. From these peaks, we assume that the passive oxide film on iron is composed of Fe3O4 and γ-Fe2O3.
Rights: © The Electrochemical Society, Inc. 2009. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in ECS Transactions, Volume 16, Issue 52, pp. 125-131, 2009.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大塚 俊明

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