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  Boosting the oxygen evolution catalytic performance of perovskites: Via optimizing calcination temperature

Lin, Q., Zhu, Y., Hu, Z., Yin, Y., Lin, H.-J., Chen, C.-T., et al. (2020). Boosting the oxygen evolution catalytic performance of perovskites: Via optimizing calcination temperature. Journal of Materials Chemistry A, 8, 6480-6486. doi:10.1039/c9ta13972a.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-49BC-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-52B0-6
Genre: Journal Article

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 Creators:
Lin, Qian1, Author
Zhu, Yinlong1, Author
Hu, Zhiwei2, Author              
Yin, Yichun1, Author
Lin, Hong-Ji1, Author
Chen, Chien-Te1, Author
Zhang, Xiwang1, Author
Shao, Zongping1, Author
Wang, Huanting1, 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: Calcination, Electronic structure, Glass membrane electrodes, Iron compounds, Oxygen, Particle size, Potassium hydroxide, Precious metals, Ruthenium compounds, Strontium compounds, X ray absorption spectroscopy, X rays, Calcination temperature, Catalytic performance, Glassy carbon electrodes, Intrinsic activities, Metal-oxygen bonds, Preparation conditions, Proof of concept, Soft x-ray absorption spectroscopies, Perovskite
 Abstract: We report a facile and universal strategy with simultaneous modulation of intrinsic activity and active site numbers to optimize the catalytic performance of perovskites via controlling calcination temperature. As a proof-of-concept, the optimized SCF-800 perovskite (SrCo0.5Fe0.5O3-δ prepared with a calcination temperature of 800 °C) shows prominent OER activity (e.g., 327 mV at 10 mA cm-2 on a glassy carbon electrode in 0.1 M KOH), outperforming the benchmark noble-metal RuO2 and ranking the highest among perovskite-based catalysts reported to date. Experimental results reveal that the reduced particle size (increased surface area) due to a lower calcination temperature provides more active sites, and that the favorable electronic structure with high covalency of metal-oxygen bonds, as demonstrated by advanced soft X-ray absorption spectroscopy (sXAS), contributes to the intrinsic activity enhancement. This work provides a new and facile way for improving the catalytic performance via only regulating preparation conditions. This journal is © The Royal Society of Chemistry.

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Language(s): eng - English
 Dates: 2020-04-142020-04-14
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1039/c9ta13972a
 Degree: -

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Title: Journal of Materials Chemistry A
  Abbreviation : J. Mater. Chem. A
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 8 Sequence Number: - Start / End Page: 6480 - 6486 Identifier: ISSN: 2050-7488
CoNE: https://pure.mpg.de/cone/journals/resource/2050-7488