Tepelná dekompozice oxidů železa (VI), K2FeO4 a BaFeO4 v ochranném prostředí

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F06%3A00003411" target="_blank" >RIV/61989592:15310/06:00003411 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thermal decomposition of iron(VI) oxides, K2FeO4 and BaFeO4, in an inert atmosphere

Popis výsledku v původním jazyce

The thermal decomposition of solid samples of iron(VI) oxides, K2FeO4 *0.088 H2O (1) and BaFeO4 *0.25H2O (2) in inert atmosphere has been examined using simultaneous thermogravimetry and differential thermal analysis (TG/DTA), in combination with in situanalysis of the evolved gases by online coupled mass spectrometer (EGA-MS). The final decomposition products were characterized by 57Fe Mössbauer spectroscopy. Water molecules were released first, followed by a distinct decomposition step with endothermic DTA peak of 1 and 2 at 273 and 248 1C, respectively, corresponding to the evolution of molecular oxygen as confirmed by EGA-MS. The released amounts of O2 were determined as 0.42 and 0.52 mol pro formula of 1 and 2, respectively. The decomposition product of K2FeO4 at 250 1C was determined as Fe(III) species in the form of KFeO2. Formation of an amorphous mixture of superoxide, peroxide, and oxide of potassium may be other products of the thermal conversion of iron(VI) oxide 1 to acco

Název v anglickém jazyce

Thermal decomposition of iron(VI) oxides, K2FeO4 and BaFeO4, in an inert atmosphere

Popis výsledku anglicky

The thermal decomposition of solid samples of iron(VI) oxides, K2FeO4 *0.088 H2O (1) and BaFeO4 *0.25H2O (2) in inert atmosphere has been examined using simultaneous thermogravimetry and differential thermal analysis (TG/DTA), in combination with in situanalysis of the evolved gases by online coupled mass spectrometer (EGA-MS). The final decomposition products were characterized by 57Fe Mössbauer spectroscopy. Water molecules were released first, followed by a distinct decomposition step with endothermic DTA peak of 1 and 2 at 273 and 248 1C, respectively, corresponding to the evolution of molecular oxygen as confirmed by EGA-MS. The released amounts of O2 were determined as 0.42 and 0.52 mol pro formula of 1 and 2, respectively. The decomposition product of K2FeO4 at 250 1C was determined as Fe(III) species in the form of KFeO2. Formation of an amorphous mixture of superoxide, peroxide, and oxide of potassium may be other products of the thermal conversion of iron(VI) oxide 1 to acco

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

<a href="/cs/project/1M0512" target="_blank" >1M0512: Centrrum výzkumu práškových nanomateriálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

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Svazek periodika

5

Číslo periodika v rámci svazku

179

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1426-1433

Kód UT WoS článku

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EID výsledku v databázi Scopus

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