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Issue 12, 2017
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Geometric effect in the highly selective hydrogenation of 3-methylcrotonaldehyde over Pt@ZIF-8 core–shell catalysts

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Abstract

ZIF-8 encapsulated Pt nanoparticles (NPs) were investigated for the hydrogenation of 3-methylcrotonaldehyde to prenol using the geometric effect. HR-TEM, HAADF-STEM, XRD, nitrogen adsorption isotherm characterization and size-selective reaction evaluation demonstrated that the Pt NPs were encapsulated in the inner space of ZIF-8. The Pt NPs in the Pt@ZIF-8 catalyst were surrounded by apertures with sizes commensurate with 3-methylcrotonaldehyde molecules. These narrow apertures forced the 3-methylcrotonaldehyde molecules to linearly approach the active sites. The C[double bond, length as m-dash]C bond in the middle of the 3-methylcrotonaldehyde molecule was prevented from interacting with the Pt active sites by the narrow apertures around the Pt NPs, while the C[double bond, length as m-dash]O bond at the tail-end was easily adsorbed and further hydrogenated to prenol. Using this geometric effect, the Pt@ZIF-8 catalyst exhibited a high selectivity to prenol (>84%) even at a high conversion (>90%).

Graphical abstract: Geometric effect in the highly selective hydrogenation of 3-methylcrotonaldehyde over Pt@ZIF-8 core–shell catalysts

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Publication details

The article was received on 23 Feb 2017, accepted on 08 May 2017 and first published on 09 May 2017


Article type: Paper
DOI: 10.1039/C7CY00353F
Citation: Catal. Sci. Technol., 2017,7, 2601-2608
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    Geometric effect in the highly selective hydrogenation of 3-methylcrotonaldehyde over Pt@ZIF-8 core–shell catalysts

    X. Lan, N. Huang, J. Wang and T. Wang, Catal. Sci. Technol., 2017, 7, 2601
    DOI: 10.1039/C7CY00353F

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