Alkoxylation of α, β-unsaturated aldehydes on gold supported on mesoporous anatase

Shota Kenjo, Hideaki Yoshitake

    Abstract

    Mesoporous anatase prepared by calcination of mesoporous amorphous titania from 673 to 923 K was used as supports for gold catalysts for the alkoxylation of α, β-unsaturated aldehydes. The size of anatase crystallites increases with calcination temperature, resulting in enlargement of mesopores. We show a clear positive correlation between the average size of gold particles on the catalyst, prepared by deposition-precipitation method on these mesoporous anatases, with the size of the mesopores. Although the particle size distributions are wide when the average is large, this simple method can be used to roughly control of the particle size of metal catalysts. Alkoxylation of α, β-unsaturated aldehydes was carried out by the conversion of acrolein, methacrolein and crotonaldehyde in methanol. The variations in selectivity and activity are explained mainly on the basis of the size of the crystallites on the support oxide.

    Original languageEnglish
    Pages (from-to)12-22
    Number of pages11
    JournalMicroporous and Mesoporous Materials
    Volume237
    DOIs
    StatePublished - 2017 Jan 1

    Fingerprint

    Titanium dioxide
    Aldehydes
    Gold
    Catalysts
    Crystallites
    Calcination
    Catalyst supports
    Particle size analysis
    Methanol
    Titanium
    Particle size
    Oxides
    Metals
    Temperature

    Keywords

    • Alkoxylation of acrolein
    • Gold catalyst
    • Mesoporous anatase
    • Mesoporous titania
    • Methyl acrylate

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials

    Cite this

    Alkoxylation of α, β-unsaturated aldehydes on gold supported on mesoporous anatase. / Kenjo, Shota; Yoshitake, Hideaki.

    In: Microporous and Mesoporous Materials, Vol. 237, 01.01.2017, p. 12-22.

    Research output: Contribution to journalArticle

    Kenjo, Shota; Yoshitake, Hideaki / Alkoxylation of α, β-unsaturated aldehydes on gold supported on mesoporous anatase.

    In: Microporous and Mesoporous Materials, Vol. 237, 01.01.2017, p. 12-22.

    Research output: Contribution to journalArticle

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    AB - Mesoporous anatase prepared by calcination of mesoporous amorphous titania from 673 to 923 K was used as supports for gold catalysts for the alkoxylation of α, β-unsaturated aldehydes. The size of anatase crystallites increases with calcination temperature, resulting in enlargement of mesopores. We show a clear positive correlation between the average size of gold particles on the catalyst, prepared by deposition-precipitation method on these mesoporous anatases, with the size of the mesopores. Although the particle size distributions are wide when the average is large, this simple method can be used to roughly control of the particle size of metal catalysts. Alkoxylation of α, β-unsaturated aldehydes was carried out by the conversion of acrolein, methacrolein and crotonaldehyde in methanol. The variations in selectivity and activity are explained mainly on the basis of the size of the crystallites on the support oxide.

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    KW - Mesoporous titania

    KW - Methyl acrylate

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