Transformation of Solid Potassium Ferrate(VI) (K2FeO4): Mechanism and Kinetic Effect of Air Humidity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F09%3A00010375" target="_blank" >RIV/61989592:15310/09:00010375 - 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

Transformation of Solid Potassium Ferrate(VI) (K2FeO4): Mechanism and Kinetic Effect of Air Humidity

Popis výsledku v původním jazyce

The kinetics of solid-state transformation (aging) of potassium ferrate(VI) (K2FeO4) under various air-humidity conditions (55-95% relative humidity) at room temperature were studied by in-situ Mossbauer spectroscopy. The kinetic data showed a significant increase in the decomposition rate with increasing air humidity. The decomposition kinetics is very unusual with two almost linear decay steps. The first slow decay was observable at rather lower humidity levels (55-70%) probably due to the formation of the narrow compact layer of nanoparticulate Fe(OH)(3) reaction product. This layer limits the access of both H2O and CO2 participating in the reaction as the gaseous reactants. The second decay with much faster rate showed a nearly positive linear relationship with the humidity. The identification and characterization of the final products of aging were conducted by using X-ray diffraction (XRD), variable-temperature and in-field Mossbauer spectroscopy, magnetic measurements, thermogra

Název v anglickém jazyce

Transformation of Solid Potassium Ferrate(VI) (K2FeO4): Mechanism and Kinetic Effect of Air Humidity

Popis výsledku anglicky

The kinetics of solid-state transformation (aging) of potassium ferrate(VI) (K2FeO4) under various air-humidity conditions (55-95% relative humidity) at room temperature were studied by in-situ Mossbauer spectroscopy. The kinetic data showed a significant increase in the decomposition rate with increasing air humidity. The decomposition kinetics is very unusual with two almost linear decay steps. The first slow decay was observable at rather lower humidity levels (55-70%) probably due to the formation of the narrow compact layer of nanoparticulate Fe(OH)(3) reaction product. This layer limits the access of both H2O and CO2 participating in the reaction as the gaseous reactants. The second decay with much faster rate showed a nearly positive linear relationship with the humidity. The identification and characterization of the final products of aging were conducted by using X-ray diffraction (XRD), variable-temperature and in-field Mossbauer spectroscopy, magnetic measurements, thermogra

Druh

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

CEP obor

CF - Fyzikální chemie a teoretická 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)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

European Journal of Inorganic Chemistry

ISSN

1434-1948

e-ISSN

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Svazek periodika

2009

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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