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Issue 5, 2011
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ZnO based nanowires grown by chemical vapour deposition for selective hydrogenation of acetylenealcohols

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Abstract

Vertically aligned ZnO nanowires (NWs) with a length of 1.5–10 μm and a mean diameter of ca. 150 nm were grown by chemical vapour deposition onto a c-oriented ZnO seed layer which was deposited by atomic layer deposition on Si substrates. The substrates were then spin-coated with an ethanol solution containing Pd nanoparticles with an average size of 2.7 and 4.5 nm. A homogeneous distribution of the Pd nanoparticles on ZnO NWs has been obtained using both Pd particle series. The catalytic activity of the ZnO NWs and Pd/ZnO NWs catalysts was measured in the semihydrogenation of 2-methyl-3-butyn-2-ol at 303-343 K and a pressure of 2–10 bar. The effect of the solvent used on the catalytic performance of the Pd/ZnO NWs catalyst was studied. The Pd/ZnO catalysts showed alkene selectivity of up to 95% at an alkyne conversion of 99%. A kinetic model is proposed to explain the activity and selectivity of the ZnO support and Pd/ZnO catalysts.

Graphical abstract: ZnO based nanowires grown by chemical vapour deposition for selective hydrogenation of acetylene alcohols

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Publication details

The article was received on 04 Mar 2011, accepted on 16 Apr 2011 and first published on 26 May 2011


Article type: Paper
DOI: 10.1039/C1CY00074H
Catal. Sci. Technol., 2011,1, 768-777

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    ZnO based nanowires grown by chemical vapour deposition for selective hydrogenation of acetylene alcohols

    L. N. Protasova, E. V. Rebrov, K. L. Choy, S. Y. Pung, V. Engels, M. Cabaj, A. E. H. Wheatley and J. C. Schouten, Catal. Sci. Technol., 2011, 1, 768
    DOI: 10.1039/C1CY00074H

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