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  The effect of particle proximity on the oxygen reduction rate of size-selected platinum clusters

Nesselberger, M., Roefzaad, M., Hamou, F. R., Biedermann, P. U., Schweinberger, F. F., Kunz, S., et al. (2013). The effect of particle proximity on the oxygen reduction rate of size-selected platinum clusters. Nature Materials, 12(10), 919-924. doi:10.1038/NMAT3712.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-D677-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-D733-E
Genre: Journal Article

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 Creators:
Nesselberger, Markus1, Author              
Roefzaad, Melanie1, Author              
Hamou, Fayçal Riad2, Author              
Biedermann, P. Ulrich3, Author              
Schweinberger, Florian F.4, Author              
Kunz, Sebastian4, Author              
Schloegl, Katrin1, Author              
Wiberg, Gustav K. H.1, Author              
Ashton, Sean1, Author              
Heiz, Ueli5, Author              
Mayrhofer, Karl J. J.6, Author              
Arenz, Matthias1, Author              
Affiliations:
1Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark , ou_persistent22              
2Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2074315              
3Atomistic Modelling, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863350              
4Lehrstuhl für Physikalische Chemie, Zentralinstitut Für Katalyseforschung, Technische Universität München, Lichtenbergstr. 4, D-85748 Garching, Germany, ou_persistent22              
5 Lehrstuhl für Physikalische Chemie, Zentralinstitut für Katalyseforschung, Technische Universität München, Lichtenbergstr. 4, D-85748 Garching, Germany , ou_persistent22              
6Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              

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Free keywords: Carbon substrates; Catalyst material; Dispersion effect; Interparticle distances; Oxygen reduction rate; Oxygen reduction reaction; Platinum clusters; Surface activities
 Abstract: The diminished surface-area-normalized catalytic activity of highly dispersed Pt nanoparticles compared with bulk Pt is particularly intricate, and not yet understood. Here we report on the oxygen reduction reaction (ORR) activity of well-defined, size-selected Pt nanoclusters; a unique approach that allows precise control of both the cluster size and coverage, independently. Our investigations reveal that size-selected Pt nanoclusters can reach extraordinarily high ORR activities, especially in terms of mass-normalized activity, if deposited at high coverage on a glassy carbon substrate. It is observed that the Pt cluster coverage, and hence the interparticle distance, decisively influence the observed catalytic activity and that closely packed assemblies of Pt clusters approach the surface activity of bulk Pt. Our results open up new strategies for the design of catalyst materials that circumvent the detrimental dispersion effect, and may eventually allow the full electrocatalytic potential of Pt nanoclusters to be realized.

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Language(s): eng - English
 Dates: 2013-10
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000324736000018
DOI: 10.1038/NMAT3712
 Degree: -

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Title: Nature Materials
  Abbreviation : Nat. Mater.
Source Genre: Journal
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Publ. Info: London, UK : Nature Pub. Group
Pages: - Volume / Issue: 12 (10) Sequence Number: - Start / End Page: 919 - 924 Identifier: ISSN: 1476-1122
CoNE: /journals/resource/111054835734000