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  Utilizing ion leaching effects for achieving high oxygen-evolving performance on hybrid nanocomposite with self-optimized behaviors

Guan, D., Ryu, G., Hu, Z., Zhou, J., Dong, C.-L., Huang, Y.-C., et al. (2020). Utilizing ion leaching effects for achieving high oxygen-evolving performance on hybrid nanocomposite with self-optimized behaviors. Nature Communications, 11: 3376, pp. 1-10. doi:10.1038/s41467-020-17108-5.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-BF30-D Version Permalink: http://hdl.handle.net/21.11116/0000-0006-BF31-C
Genre: Journal Article

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 Creators:
Guan, Daqin1, Author
Ryu, Gihun2, Author              
Hu, Zhiwei3, Author              
Zhou, Jing1, Author
Dong, Chung-Li1, Author
Huang, Yu-Cheng1, Author
Zhang, Kaifeng1, Author
Zhong, Yijun1, Author
Komarek, Alexander C.4, Author              
Zhu, Ming1, Author
Wu, Xinhao1, Author
Pao, Chih-Wen1, Author
Chang, Chung-Kai1, Author
Lin, Hong-Ji1, Author
Chen, Chien-Te1, Author
Zhou, Wei1, Author
Shao, Zongping1, 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              
4Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              

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Free keywords: barium chloride, nanocomposite, perovskite, strontium chloride, adsorption, Article, chemical structure, crystal structure, crystallization, cyclic voltammetry, drug synthesis, electric conductivity, electrochemical analysis, electron spin resonance, energy dispersive X ray spectroscopy, high resolution transmission electron microscopy, impedance spectroscopy, inductively coupled plasma mass spectrometry, leaching, oxygen evolution, particle size, physical parameters, spectroscopy, structure analysis, X ray photoemission spectroscopy
 Abstract: Ion leaching from pure-phase oxygen-evolving electrocatalysts generally exists, leading to the collapse and loss of catalyst crystalline matrix. Here, different from previous design methodologies of pure-phase perovskites, we introduce soluble BaCl2 and SrCl2 into perovskites through a self-assembly process aimed at simultaneously tuning dual cation/anion leaching effects and optimizing ion match in perovskites to protect the crystalline matrix. As a proof-of-concept, self-assembled hybrid Ba0.35Sr0.65Co0.8Fe0.2O3-δ (BSCF) nanocomposite (with BaCl2 and SrCl2) exhibits the low overpotential of 260 mV at 10 mA cm-2 in 0.1 M KOH. Multiple operando spectroscopic techniques reveal that the pre-leaching of soluble compounds lowers the difference of interfacial ion concentrations and thus endows the host phase in hybrid BSCF with abundant time and space to form stable edge/face-sharing surface structures. These self-optimized crystalline structures show stable lattice oxygen active sites and short reaction pathways between Co–Co/Fe metal active sites to trigger favorable adsorption of OH− species. © 2020, The Author(s).

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Language(s): eng - English
 Dates: 2020-07-062020-07-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41467-020-17108-5
 Degree: -

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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: 11 Sequence Number: 3376 Start / End Page: 1 - 10 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723