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Bimetallic Pd–Pt alloy nanocluster arrays on graphene/Rh(111): formation, stability, and dynamics

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Abstract

Alloy catalysts have, in many cases, superior properties compared to their single metal counterparts. To gain deeper insights, we used graphene-supported bimetallic nanocluster arrays as a model system. We investigated the site occupation and the dynamic behavior of the metal distribution during adsorption and thermal treatment of CO layers on PdPt alloy nanocluster arrays supported on the graphene/Rh(111) Moiré. We find that the adsorption of CO combined with heating to 550 K leads to a rearrangement of the surface atoms, resulting in all the edge sites of the nanoclusters being occupied by Pd atoms. At the same time, Pt gets enriched at the surface.

Graphical abstract: Bimetallic Pd–Pt alloy nanocluster arrays on graphene/Rh(111): formation, stability, and dynamics

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Publication details

The article was received on 13 Jun 2018, accepted on 28 Jul 2018 and first published on 31 Jul 2018


Article type: Paper
DOI: 10.1039/C8CP03749C
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Bimetallic Pd–Pt alloy nanocluster arrays on graphene/Rh(111): formation, stability, and dynamics

    F. Düll, U. Bauer, F. Späth, P. Bachmann, J. Steinhauer, H. Steinrück and C. Papp, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP03749C

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