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Cathodic Reduction of Anodic Oxide Films Formed on Titanium

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J.Electrochem.Soc.134,2406-2410(1987), Cathodic reduction --titanium.pdf582.85 kBPDFView/Open
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Title: Cathodic Reduction of Anodic Oxide Films Formed on Titanium
Authors: Ohtsuka, Toshiaki Browse this author →KAKEN DB
Masuda, Minoru Browse this author
Sato, Norio Browse this author
Keywords: electrochemical analysis
electrochemical electrodes
reduction (chemical)
Issue Date: Oct-1987
Publisher: The Electrochemical Society
Journal Title: J. Electrochemical Society
Volume: 134
Issue: 10
Start Page: 2406
End Page: 2410
Publisher DOI: 10.1149/1.2100212
Abstract: Cathodic reduction behavior of the anodic oxide film on titanium has been investigated by using ellipsometry combined with electrochemistry. In acidic sulfate solution, the anodic oxide film reductively dissolves into the solution as Ti(III) ion, resulting in the thinning of its thickness without any significant change of the optical property of the remaining film. In neutral phosphate solutiofi, the anodic oxide film absorbs hydrogen in the hydrogen evolution potential region, resulting in a change of the optical property without thinning its thickness. The amount of hydrogen absorbed per unit volume of the film does not depend on the film thickness but on the cathodic potential. The composition change estimated from measurements of anodJc charge during the hydrogen release process indicates that the hydrogen absorption begins to occur at about -0.25V (vs. RHE) and that the anodic film changes in its composition from TiO2 to TiOOH at -0.9V. The hydrogen absorption induces a decrease of the refractive index and an increase of the extinction index of the anodic film.
Rights: © The Electrochemical Society, Inc. 1987. 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 J. Electrochem. Soc. 1987 volume 134, issue 10, 2406-2410 .
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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