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Nitrogen-Rich Manganese Oxynitrides with Enhanced Catalytic Activity in the Oxygen Reduction Reaction

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タイトル: Nitrogen-Rich Manganese Oxynitrides with Enhanced Catalytic Activity in the Oxygen Reduction Reaction
著者: Miura, Akira 著作を一覧する
Rosero-Navarro, Carolina 著作を一覧する
Masubuchi, Yuji 著作を一覧する
Higuchi, Mikio 著作を一覧する
Kikkawa, Shinichi 著作を一覧する
Tadanaga, Kiyoharu 著作を一覧する
発行日: 2016年 5月19日
出版者: Wiley-Blackwell
誌名: Angewandte Chemie International Edition
開始ページ: 7963
終了ページ: 7967
出版社 DOI: 10.1002/anie.201601568
抄録: The catalytic activity of manganese oxynitrides in the oxygen reduction reaction (ORR) was investigated in alkaline solutions to clarify the effect of nitrogen on ORR activity. These oxynitrides, having rocksalt-based structures with different nitrogen content, were synthesized by reactions of MnO, Mn2O3, and MnO2 with molten NaNH2 at 240-280 ℃. Anion contents and Mn valence states were determined by combustion analysis, powder X-ray diffraction, and X-ray absorption near edge structure analysis. An increase in nitrogen content in rocksalt- based manganese oxynitrides enhanced the valence of manganese and reinforced the catalytic activity for the ORR in 1 M KOH solution. Nearly single-electron occupancy in antibonding eg states and high covalency in Mn–N bonding would enhance the ORR activity of nitrogen-rich manganese oxynitrides.
Rights: This is the peer reviewed version of the following article: Nitrogen-Rich Manganese Oxynitrides with Enhanced Catalytic Activity in the Oxygen Reduction Reaction, which has been published in final form at http://dx.doi.org/10.1002/anie.201601568. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/65491
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 三浦 章

 

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