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  Realizing High and Stable Electrocatalytic Oxygen Evolution for Iron-Based Perovskites by Co-Doping-Induced Structural and Electronic Modulation

She, S., Zhu, Y., Wu, X., Hu, Z., Shelke, A., Pong, W.-F., et al. (2022). Realizing High and Stable Electrocatalytic Oxygen Evolution for Iron-Based Perovskites by Co-Doping-Induced Structural and Electronic Modulation. Advanced Functional Materials, 32(15): 2111091, pp. 1-10. doi:10.1002/adfm.202111091.

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 Creators:
She, Sixuan1, Author
Zhu, Yinlong1, Author
Wu, Xinhao1, Author
Hu, Zhiwei2, Author              
Shelke, Abhijeet1, Author
Pong, Way-Faung1, Author
Chen, Yubo1, Author
Song, Yufei1, Author
Liang, Mingzhuang1, Author
Chen, Chien-Te1, Author
Wang, Huanting1, 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: Catalyst activity, Durability, Electrocatalysts, Energy conversion, Iron oxides, Modulation, Oxygen, Strontium compounds, Co-doping, Electrocatalytic, Electrochemical process, Fuel production, Iron-based, Low-costs, Oxygen evolution, Perovskite oxides, Precious-metal catalysts, Production technology, Perovskite
 Abstract: Oxygen evolution reaction (OER) is a vital electrochemical process for various energy conversion and fuel production technologies. Co/Ni-rich perovskite oxides are extensively studied as promising alternatives to precious-metal catalysts; however, low-cost and earth-abundant iron (Fe)-rich perovskites are rarely investigated to date due to their poor activity and durability. This study reports an Fe-rich Sr0.95Ce0.05Fe0.9Ni0.1O3−δ (SCFN) perovskite oxide with minor Ce/Ni co-doping in A/B sites as a high-performance OER electrocatalyst. Impressively, SCFN shows more than an order of magnitude enhancement in mass-specific activity compared to the SrFeO3−δ (SF) parent oxide, and delivers an attractive small overpotential of 340 mV at 10 mA cm−2, outperforming many Co/Ni-rich perovskite oxides ever reported. Additionally, SCFN displays robust operational durability with negligible activity loss under alkaline OER conditions. The increased activity and stability of SCFN can be ascribed to co-doping-induced synergistic promotion between structural and electronic modulation, where Ce doping facilitates the formation of a 3D corner-sharing cubic structure and Ni doping gives rise to strong electronic interactions between active sites, which is key to achieving a highly active long-life catalyst. Importantly, this strategy is universal and can be extended to other Fe-based parent perovskite oxides with high structural diversity. © 2021 Wiley-VCH GmbH

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Language(s): eng - English
 Dates: 2022-04-112022-04-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/adfm.202111091
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Title: Advanced Functional Materials
  Abbreviation : Adv. Funct. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH Verlag GmbH
Pages: - Volume / Issue: 32 (15) Sequence Number: 2111091 Start / End Page: 1 - 10 Identifier: ISSN: 1616-301X
CoNE: https://pure.mpg.de/cone/journals/resource/954925596563