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

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Title: Nitrogen-Rich Manganese Oxynitrides with Enhanced Catalytic Activity in the Oxygen Reduction Reaction
Authors: Miura, Akira Browse this author →KAKEN DB
Rosero-Navarro, Carolina Browse this author
Masubuchi, Yuji Browse this author →KAKEN DB
Higuchi, Mikio Browse this author →KAKEN DB
Kikkawa, Shinichi Browse this author →KAKEN DB
Tadanaga, Kiyoharu Browse this author →KAKEN DB
Issue Date: 19-May-2016
Publisher: Wiley-Blackwell
Journal Title: Angewandte Chemie International Edition
Start Page: 7963
End Page: 7967
Publisher DOI: 10.1002/anie.201601568
PMID: 27193352
Abstract: 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.
Type: article (author version)
URI: http://hdl.handle.net/2115/65491
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: 三浦 章

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