Supported mesoporous solid base catalysts for condensation of carboxylic acids

Ambareesh D. Murkute, James E. Jackson, Dennis J. Miller

    Research output: Contribution to journalArticle

    • 31 Citations

    Abstract

    New mesoporous base catalysts (CM-HMS and CM-MCM-41) were synthesized by generating uniform particles of cerium and manganese oxides (MnO x/CeO2) in situ within hexagonal mesoporous silica (HMS) and MCM-41 supports. These catalysts were characterized by N2 adsorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDX), FTIR, temperature-programmed desorption of CO2 (CO2-TPD), and diffuse reflectance UV-visible (UV-vis) spectroscopy. Spectroscopic studies reveal that some particles of MnOx/CeO2 are incorporated into the walls of the silica network of HMS and MCM-41, while others are highly dispersed onto the surface of the HMS or MCM-41. The catalytic activity of CM-HMS and CM-MCM-41 for the ketonization of carboxylic acids was confirmed; better utilization of Ce and Mn was observed than in unsupported MnOx/CeO2. The citrate-based preparation of MnOx/CeO2 catalyst supported on HMS and MCM-41 has not been previously reported in the literature.

    Original languageEnglish (US)
    Pages (from-to)189-199
    Number of pages11
    JournalJournal of Catalysis
    Volume278
    Issue number2
    DOIs
    StatePublished - Mar 7 2011

    Profile

    Silica
    silicon dioxide
    Multicarrier modulation
    catalysts
    Catalysts
    Afferent Loop Syndrome
    Temperature programmed desorption
    Carboxylic acids
    Catalyst supports
    carboxylic acids
    Liver Mitochondrion
    Manganese oxide
    Cerium
    Ultraviolet spectroscopy
    Condensation
    Catalyst activity
    Transmission electron microscopy
    Adsorption
    X ray diffraction
    cerium oxides

    Keywords

    • Carboxylic acids
    • Cerium
    • Ketonization
    • Manganese
    • Mesoporous silica

    ASJC Scopus subject areas

    • Catalysis
    • Physical and Theoretical Chemistry

    Cite this

    Supported mesoporous solid base catalysts for condensation of carboxylic acids. / Murkute, Ambareesh D.; Jackson, James E.; Miller, Dennis J.

    In: Journal of Catalysis, Vol. 278, No. 2, 07.03.2011, p. 189-199.

    Research output: Contribution to journalArticle

    Murkute, Ambareesh D.; Jackson, James E.; Miller, Dennis J. / Supported mesoporous solid base catalysts for condensation of carboxylic acids.

    In: Journal of Catalysis, Vol. 278, No. 2, 07.03.2011, p. 189-199.

    Research output: Contribution to journalArticle

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    KW - Carboxylic acids

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    KW - Ketonization

    KW - Manganese

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