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Surface Oxide Film and its Influence on the Oxygen Reduction on Pd-Co and Pt-Co PEFC Cathodes

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タイトル: Surface Oxide Film and its Influence on the Oxygen Reduction on Pd-Co and Pt-Co PEFC Cathodes
著者: Tamura, Yuichi 著作を一覧する
Taneda, Kento 著作を一覧する
Ueda, Mikito 著作を一覧する
Ohtsuka, Toshiaki 著作を一覧する
発行日: 2008年
出版者: The Electrochemical Society
巻: 16
号: 2
開始ページ: 741
終了ページ: 750
出版社 DOI: 10.1149/1.2981910
抄録: PtCo and PdCo alloy electrodes were investigated in a 0.5 M sulfuric acid solution by electrochemistry, ellipsometry, laser Raman scattering spectroscopy, XPS, and GD-OES. The corrosion resistibility of Pt-Co and Pd-Co alloys decreased with increase of Co addition. The increase of Co addition, however, enhanced the catalytic efficiency on the ORR. The alloy surfaces may be covered by CoOOH and Pt or Pd oxide 2-3nm thick. At the potential of 1.2V vs. Ag/ AgCl/ sat. KCl, the thickness of oxide film increased with the Co addition. The presence of the oxide film on the alloy electrodes increases the overvoltage for the ORR. The effect of the oxide thickness on the ORR was discussed.
Rights: © The Electrochemical Society, Inc. 2008. 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 2, pp. 741-750, 2008.
資料タイプ: article
URI: http://hdl.handle.net/2115/60229
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 大塚 俊明

 

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