Formation of tetravalent Fe ions in LaFeO3 perovskite through mechanochemical modification by ball milling

Tomoki Uchiyama; Maiko Nishibori; Hisahiro Einaga; Yasutake Teraoka

doi:10.1111/jace.13513

Formation of tetravalent Fe ions in LaFeO₃ perovskite through mechanochemical modification by ball milling

Tomoki Uchiyama, Maiko Nishibori, Hisahiro Einaga, Yasutake Teraoka

Kyushu University

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Mechanochemical modification of previously synthesized LaFeO₃ perovskite-type oxide by a high-energy ball milling was investigated to introduce Fe⁴⁺ ions or transform some Fe³⁺ into Fe⁴⁺ in LaFeO₃. X-ray absorption fine structure studies revealed that the formation of Fe⁴⁺ ions into LaFeO₃ perovskite has been achieved at first time by ball milling at room temperature without any additives or replacement of La³⁺ ions by some divalent cations. The structural model of Fe⁴⁺ containing LaFeO₃ could be described as with a modified perovskite having equal amounts of La and Fe vacancies, which is supported by a good correlation between the results of Fe K-edge XANES spectra and O₂-TPD. The synthesis of Fe⁴⁺-containing LaFeO₃ perovskite by ball milling was able to produce the O₂ adsorption capacity of nonsubstituted perovskite-type oxide.

Original language	English
Pages (from-to)	1047-1051
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	98
Issue number	4
DOIs	https://doi.org/10.1111/jace.13513
Publication status	Published - 2015 Apr 1

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title = "Formation of tetravalent Fe ions in LaFeO3 perovskite through mechanochemical modification by ball milling",

abstract = "Mechanochemical modification of previously synthesized LaFeO3 perovskite-type oxide by a high-energy ball milling was investigated to introduce Fe4+ ions or transform some Fe3+ into Fe4+ in LaFeO3. X-ray absorption fine structure studies revealed that the formation of Fe4+ ions into LaFeO3 perovskite has been achieved at first time by ball milling at room temperature without any additives or replacement of La3+ ions by some divalent cations. The structural model of Fe4+ containing LaFeO3 could be described as with a modified perovskite having equal amounts of La and Fe vacancies, which is supported by a good correlation between the results of Fe K-edge XANES spectra and O2-TPD. The synthesis of Fe4+-containing LaFeO3 perovskite by ball milling was able to produce the O2 adsorption capacity of nonsubstituted perovskite-type oxide.",

author = "Tomoki Uchiyama and Maiko Nishibori and Hisahiro Einaga and Yasutake Teraoka",

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AU - Uchiyama, Tomoki

AU - Nishibori, Maiko

AU - Einaga, Hisahiro

AU - Teraoka, Yasutake

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Mechanochemical modification of previously synthesized LaFeO3 perovskite-type oxide by a high-energy ball milling was investigated to introduce Fe4+ ions or transform some Fe3+ into Fe4+ in LaFeO3. X-ray absorption fine structure studies revealed that the formation of Fe4+ ions into LaFeO3 perovskite has been achieved at first time by ball milling at room temperature without any additives or replacement of La3+ ions by some divalent cations. The structural model of Fe4+ containing LaFeO3 could be described as with a modified perovskite having equal amounts of La and Fe vacancies, which is supported by a good correlation between the results of Fe K-edge XANES spectra and O2-TPD. The synthesis of Fe4+-containing LaFeO3 perovskite by ball milling was able to produce the O2 adsorption capacity of nonsubstituted perovskite-type oxide.

AB - Mechanochemical modification of previously synthesized LaFeO3 perovskite-type oxide by a high-energy ball milling was investigated to introduce Fe4+ ions or transform some Fe3+ into Fe4+ in LaFeO3. X-ray absorption fine structure studies revealed that the formation of Fe4+ ions into LaFeO3 perovskite has been achieved at first time by ball milling at room temperature without any additives or replacement of La3+ ions by some divalent cations. The structural model of Fe4+ containing LaFeO3 could be described as with a modified perovskite having equal amounts of La and Fe vacancies, which is supported by a good correlation between the results of Fe K-edge XANES spectra and O2-TPD. The synthesis of Fe4+-containing LaFeO3 perovskite by ball milling was able to produce the O2 adsorption capacity of nonsubstituted perovskite-type oxide.

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Formation of tetravalent Fe ions in LaFeO₃ perovskite through mechanochemical modification by ball milling

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