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Volume 188, 2016
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Acetylene hydrogenation over structured Au–Pd catalysts

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AuPd nanoparticles were prepared following a methodology designed to produce core–shell structures (an Au core and a Pd shell). Characterisation suggested that slow addition of the shell metal favoured deposition onto the pre-formed core, whereas more rapid addition favoured the formation of a monometallic Pd phase in addition to some nanoparticles with the core–shell morphology. When used for the selective hydrogenation of acetylene, samples that possessed monometallic Pd particles favoured over-hydrogenation to form ethane. A sample prepared by the slow addition of a small amount of Pd resulted in the formation of a core–shell structure but with an incomplete Pd shell layer. This material exhibited a completely different product selectivity with ethylene and oligomers forming as the major products as opposed to ethane. The improved performance was thought to be as a result of the absence of Pd particles, which are capable of forming a Pd-hydride phase, with enhanced oligomer selectivity associated with reaction on uncovered Au atoms.

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The article was received on 23 Nov 2015, accepted on 24 Nov 2015 and first published on 24 Nov 2015

Article type: Paper
DOI: 10.1039/C5FD00188A
Citation: Faraday Discuss., 2016,188, 499-523
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    Acetylene hydrogenation over structured Au–Pd catalysts

    A. J. McCue, R. T. Baker and J. A. Anderson, Faraday Discuss., 2016, 188, 499
    DOI: 10.1039/C5FD00188A

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