Vliv hydrotermálního zpracování na vlastnosti Ni-Al LDH a příslušných směsných oxidů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F09%3A00323573" target="_blank" >RIV/61388955:_____/09:00323573 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/09:00323573 RIV/67985858:_____/09:00323573 RIV/60461373:22310/09:00021632 RIV/61989100:27360/09:00022078

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of hydrothermal treatment on properties of Ni-Al layered double hydroxides and related mixed oxides

Popis výsledku v původním jazyce

The Ni-Al layered double hydroxides (LDHs) with Ni/Al molar ratio of 2, 3, and 4 were prepared by coprecipitation and treated under hydrothermal conditions at 180 °C. Hydrothermal treatment increased significantly the crystallite size of coprecipitated samples. Gradual crystallization of NiO-like mixed oxide was observed at higher temperatures. Hydrothermal treatment improved thermal stability of the Ni2Al and Ni3Al LDHs but only a slight effect of hydrothermal treatment was observed with the Ni4Al sample. Hydrothermal aging of the LDHs resulted in decreasing content of the amorphous component and enhanced substitution of Al cations into NiO-like structure. The hydrothermally treated samples also exhibited a worse reducibility of Ni2+ components and anincrease in pore size with increasing time of hydrothermal aging. The hydrothermal treatment of LDH precursor significantly improved the catalytic activity of Ni2Al mixed oxides in N2O decomposition.

Název v anglickém jazyce

Effect of hydrothermal treatment on properties of Ni-Al layered double hydroxides and related mixed oxides

Popis výsledku anglicky

The Ni-Al layered double hydroxides (LDHs) with Ni/Al molar ratio of 2, 3, and 4 were prepared by coprecipitation and treated under hydrothermal conditions at 180 °C. Hydrothermal treatment increased significantly the crystallite size of coprecipitated samples. Gradual crystallization of NiO-like mixed oxide was observed at higher temperatures. Hydrothermal treatment improved thermal stability of the Ni2Al and Ni3Al LDHs but only a slight effect of hydrothermal treatment was observed with the Ni4Al sample. Hydrothermal aging of the LDHs resulted in decreasing content of the amorphous component and enhanced substitution of Al cations into NiO-like structure. The hydrothermally treated samples also exhibited a worse reducibility of Ni2+ components and anincrease in pore size with increasing time of hydrothermal aging. The hydrothermal treatment of LDH precursor significantly improved the catalytic activity of Ni2Al mixed oxides in N2O decomposition.

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/GA104%2F07%2F1400" target="_blank" >GA104/07/1400: Deposice oxidických katalyzátorů pro oxidaci VOC na tvarovaný nosič a jejich modifikace nanočásticemi drahých kovů</a><br>

Návaznosti

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

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

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Svazek periodika

182

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000262546200004

EID výsledku v databázi Scopus

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