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  Boosting oxygen reduction activity and enhancing stability through structural transformation of layered lithium manganese oxide

Zhong, X., Oubla, M., Wang, X., Huang, Y., Zeng, H., Wang, S., et al. (2021). Boosting oxygen reduction activity and enhancing stability through structural transformation of layered lithium manganese oxide. Nature Communications, 12: 3136, pp. 1-12. doi:10.1038/s41467-021-23430-3.

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 Creators:
Zhong, Xuepeng1, Author
Oubla, M'hamed1, Author
Wang, Xiao2, Author              
Huang, Yangyang1, Author
Zeng, Huiyan1, Author
Wang, Shaofei1, Author
Liu, Kun1, Author
Zhou, Jian1, Author
He, Lunhua1, Author
Zhong, Haihong1, Author
Alonso-Vante, Nicolas1, Author
Wang, Chin-Wei1, Author
Wu, Wen-Bin1, Author
Lin, Hong-Ji1, Author
Chen, Chien-Te1, Author
Hu, Zhiwei3, Author              
Huang, Yunhui1, Author
Ma, Jiwei1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

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Free keywords: alkalinity, catalysis, catalyst, electrochemistry, lithium, manganese oxide, oxygen, transformation
 Abstract: Structural degradation in manganese oxides leads to unstable electrocatalytic activity during long-term cycles. Herein, we overcome this obstacle by using proton exchange on well-defined layered Li2MnO3 with an O3-type structure to construct protonated Li2-xHxMnO3-n with a P3-type structure. The protonated catalyst exhibits high oxygen reduction reaction activity and excellent stability compared to previously reported cost-effective Mn-based oxides. Configuration interaction and density functional theory calculations indicate that Li2-xHxMnO3-n has fewer unstable O 2p holes with a Mn3.7+ valence state and a reduced interlayer distance, originating from the replacement of Li by H. The former is responsible for the structural stability, while the latter is responsible for the high transport property favorable for boosting activity. The optimization of both charge states to reduce unstable O 2p holes and crystalline structure to reduce the reaction pathway is an effective strategy for the rational design of electrocatalysts, with a likely extension to a broad variety of layered alkali-containing metal oxides. © 2021, The Author(s).

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Language(s): eng - English
 Dates: 2021-05-252021-05-25
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41467-021-23430-3
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 12 Sequence Number: 3136 Start / End Page: 1 - 12 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723