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  An Amorphous Nickel–Iron-Based Electrocatalyst with Unusual Local Structures for Ultrafast Oxygen Evolution Reaction

Chen, G., Zhu, Y., Chen, H. M., Hu, Z., Hung, S.-F., Ma, N., et al. (2019). An Amorphous Nickel–Iron-Based Electrocatalyst with Unusual Local Structures for Ultrafast Oxygen Evolution Reaction. Advanced Materials, 1900883, pp. 1-7. doi:10.1002/adma.201900883.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-BBDA-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-BBE0-D
Genre: Journal Article

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 Creators:
Chen, Gao1, Author
Zhu, Yanping1, Author
Chen, Hao Ming1, Author
Hu, Zhiwei2, Author              
Hung, Sung-Fu1, Author
Ma, Nana1, Author
Dai, Jie1, Author
Lin, Hong-Ji1, Author
Chen, Chien-Te1, Author
Zhou, Wei1, Author
Shao, Zongping1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

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Free keywords: amorphous, local structure, NiFe, oxygen evolution reaction, perovskites
 Abstract: Rationally designing active and durable catalysts for the oxygen evolution reaction (OER) is of primary importance in water splitting. Perovskite oxides (ABO 3 ) with versatile structures and multiple physicochemical properties have triggered considerable interest in the OER. The leaching of A site cations can create nanostructures and amorphous motifs on the perovskite matrix, thus facilitating the OER process. However, selectively dissolving A site cations and simultaneously obtaining more active amorphous motifs derived from the B site cations remains a great challenge. Herein, a top-down strategy is proposed to transform bulk crystalline perovskite (LaNiO 3 ) into a nanostructured amorphous hydroxide by FeCl 3 post-treatment, resulting in an extremely low overpotential of 189 mV at 10 mA cm −2 . The top-down-constructed amorphous catalyst with a large surface area has dual NiFe active sites, where high-valence Ni 3+ -based edge-sharing octahedral frameworks are surrounded by interstitial distorted Fe octahedra and contribute to the superior OER performance. This top-down strategy provides a valid way to design novel perovskite-derived catalysts. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Language(s): eng - English
 Dates: 2019-05-172019-05-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1002/adma.201900883
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 1900883 Start / End Page: 1 - 7 Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855