Thermal decomposition of barium ferrate(VI): Mechanism and formation of Fe-IV intermediate and nanocrystalline Fe2O3 and ferrite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33159830" target="_blank" >RIV/61989592:15310/16:33159830 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0925838816301864" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0925838816301864</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2016.01.185" target="_blank" >10.1016/j.jallcom.2016.01.185</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal decomposition of barium ferrate(VI): Mechanism and formation of Fe-IV intermediate and nanocrystalline Fe2O3 and ferrite

Popis výsledku v původním jazyce

Simple high-valent iron-oxo species, ferrate(VI) ((FeO42-)-O-VI, Fe(VI)) has applications in energy storage, organic synthesis, and water purification. Of the various salts of Fe(VI), barium ferrate(VI) (BaFeO4) has also a great potential as a battery material. This paper presents the thermal decomposition of BaFeO4 in static air and nitrogen atmosphere, monitored by combination of thermal analysis, Mossbauer spectroscopy, X-ray powder diffraction, and electron-microscopic techniques. The formation of Fe-IV species in the form of BaFeO3 was found to be the primary decomposition product of BaFeO4 at temperature around 190 degrees C under both studied atmospheres. BaFeO3 was unstable in air reacting with CO2 to form barium carbonate and speromagnetic amorphous iron(III) oxide nanoparticles (<5 nm). Above 600 degrees C, a solid state reaction between BaCO3 and Fe2O3 occurred, leading to the formation of barium ferrite nanoparticles, BaFe2O4 (20-100 nm). (C) 2016 Elsevier B.V.

Název v anglickém jazyce

Thermal decomposition of barium ferrate(VI): Mechanism and formation of Fe-IV intermediate and nanocrystalline Fe2O3 and ferrite

Popis výsledku anglicky

Simple high-valent iron-oxo species, ferrate(VI) ((FeO42-)-O-VI, Fe(VI)) has applications in energy storage, organic synthesis, and water purification. Of the various salts of Fe(VI), barium ferrate(VI) (BaFeO4) has also a great potential as a battery material. This paper presents the thermal decomposition of BaFeO4 in static air and nitrogen atmosphere, monitored by combination of thermal analysis, Mossbauer spectroscopy, X-ray powder diffraction, and electron-microscopic techniques. The formation of Fe-IV species in the form of BaFeO3 was found to be the primary decomposition product of BaFeO4 at temperature around 190 degrees C under both studied atmospheres. BaFeO3 was unstable in air reacting with CO2 to form barium carbonate and speromagnetic amorphous iron(III) oxide nanoparticles (<5 nm). Above 600 degrees C, a solid state reaction between BaCO3 and Fe2O3 occurred, leading to the formation of barium ferrite nanoparticles, BaFe2O4 (20-100 nm). (C) 2016 Elsevier B.V.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

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Svazek periodika

668

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

73-79

Kód UT WoS článku

000371763700011

EID výsledku v databázi Scopus

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