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Mixed oxides obtained from Co and Mn containing layered double hydroxides: Preparation, characterization, and catalytic properties

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    0040047 - ÚACH 2007 RIV US eng J - Článek v odborném periodiku
    Kovanda, F. - Rojka, T. - Dobešová, J. - Machovič, V. - Bezdička, Petr - Obalová, L. - Jirátová, Květa - Grygar, Tomáš
    Mixed oxides obtained from Co and Mn containing layered double hydroxides: Preparation, characterization, and catalytic properties.
    [Směsné oxidy z hydrotalcitů obsahujících Co a Mn: příprava, charakterizace a katalytické vlastnosti.]
    Journal of Solid State Chemistry. Roč. 179, č. 3 (2006), s. 812-823. ISSN 0022-4596
    Grant CEP: GA ČR(CZ) GA104/04/2116; GA ČR(CZ) GA106/05/0366
    Výzkumný záměr: CEZ:AV0Z40320502; CEZ:AV0Z40720504
    Klíčová slova: layered double hydroxides * hydrotalcite-like compounds * thermal decomposition
    Kód oboru RIV: CA - Anorganická chemie
    Impakt faktor: 2.107, rok: 2006

    Thermal decomposition of prepared LDHs and formation of related mixed oxides were studied using high-temperature Xray powder diffraction and thermal analysis. A subsequent step is a complete decomposition of the layered structure to nanocrystalline spinel, the complete dehydration, and finally decarbonation of the mixed oxide phase. Spinel-type oxides were the primary crystallization products. Mg-containing primary spinels had practically empty tetrahedral cationic sites. A dramatic increase of the spinel cell size upon heating and analysis by Raman spectroscopy revealed a segregation of Co-rich spinel in Co-Mn and Co-Mn-Al specimens. These calcination products were tested as catalysts in the total oxidation of ethanol and decomposition of N2O.

    Směsné oxidy z hydrotalcitů obsahujících Co a Mn: příprava, charakterizace a katalytické vlastnosti.
    Trvalý link: http://hdl.handle.net/11104/0003585
     
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