Počet záznamů: 1  

Zeolite MCM-22 Modified with Au and Cu for Catalytic Total Oxidation of Methanol and Carbon Monoxide

  1. 1.
    SYSNO ASEP0422064
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevZeolite MCM-22 Modified with Au and Cu for Catalytic Total Oxidation of Methanol and Carbon Monoxide
    Tvůrce(i) Kaminski, P. (PL)
    Sobczak, I. (PL)
    Decyk, P. (PL)
    Ziolek, M. (PL)
    Roth, Wieslaw Jerzy (UFCH-W)
    Campo, B. (FR)
    Daturi, M. (FR)
    Zdroj.dok.Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
    Roč. 117, č. 5 (2013), s. 2147-2159
    Poč.str.13 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovaadsorption ; carbon dioxide ; MCM-22 zeolites
    Vědní obor RIVCF - Fyzikální chemie a teoretická chemie
    CEPGAP106/12/0189 GA ČR - Grantová agentura ČR
    Institucionální podporaUFCH-W - RVO:61388955
    UT WOS000314907700019
    EID SCOPUS84873463773
    DOI10.1021/jp310505y
    AnotaceThe goal of this work was to use MCM-22 zeolites for preparation of monometallic (Cu or Au) and bimetallic (Cu and Au) catalysts for oxidation reactions. The focus was on precise determination of the nature of gold and copper species and their activity in the oxidation processes. For that purpose several characterization techniques were applied (XRD, N2 adsorption/desorption, TEM, SEM, UV-vis, H2-TPR, 27Al MAS NMR, FT-IR with the adsorption of pyridine, NO, and CO, ESR spectroscopy). They allowed us to define the following species formed on MCM-22 surface: metallic gold particles (XRD, UV-vis), isolated Cu2+ with octahedral coordination (UV-vis, ESR), square planar Cu2+ cations (ESR, IR), Cu+ species (ESR+NO, FTIR+CO, and FTIR+NO), and oligonuclear clusters (UV-vis) as well as CuO-like species (H2-TPR). The presence of gold on the MCM-22 surface modified further by copper species caused the interaction between two modifiers leading to much easier reduction of CuO-like species and higher mobility of oxygen-promoting oxidative properties. The bimetallic catalyst was highly active in total oxidation of methanol and CO in the temperature range 523-623 K. Cu/Au-MCM-22 zeolite appeared useful for simultaneous removal of CO and methanol (by total oxidation) from gases emitted from automotive devices and during a variety of industrial process operations.
    PracovištěÚstav fyzikální chemie J.Heyrovského
    KontaktMichaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
    Rok sběru2014
Počet záznamů: 1  

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