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  Does the Surface Structure of Oxide Affect the Strong Metal-Support Interaction with Platinum? Platinum on Fe3O4(001) vs Fe3O4(111)

Zhang, K., Shaikhutdinov, S. K., & Freund, H.-J. (2015). Does the Surface Structure of Oxide Affect the Strong Metal-Support Interaction with Platinum? Platinum on Fe3O4(001) vs Fe3O4(111). ChemCatChem, 7(22), 3725-3730. doi:10.1002/cctc.201500328.

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Pt Fe3O4(100) ChemCatChem.pdf (Any fulltext), 2MB
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Pt Fe3O4(100) ChemCatChem.pdf
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2015
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Wiley
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 Creators:
Zhang, Ke1, Author              
Shaikhutdinov, Shamil K.1, Author              
Freund, Hans-Joachim1, Author              
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              

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Free keywords: iron; platinum; supported catalysts; surface analysis; thin films
 Abstract: We studied the structure and thermal stability of Pt deposited on a Fe3O4(0 0 1) thin film to make a comparison with the Pt/Fe3O4(1 1 1) system that shows a strong metal–support interaction (SMSI) through encapsulation. Pt adatoms interact strongly with the (√2×√2)R45°-reconstructed Fe3O4(0 0 1) surface and adsorb monoatomically on the “narrow” sites. Metal sintering sets in only above 700 K to result in cuboid Pt nanoparticles exposing primarily (1 0 0) and (1 1 0) facets. Concomitantly, CO adsorption on Pt is fully suppressed as a result of the SMSI. The results provided strong evidence that the Pt nanoparticles on Fe3O4(0 0 1) are encapsulated by an FeO(1 1 1) layer in the same manner as observed for hemispherical Pt particles on Fe3O4(1 1 1). The comparison suggests that the SMSI effect through encapsulation is insensitive to the surface structure of the oxide, although the latter strongly affects the particle morphology.

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Language(s): eng - English
 Dates: 2015-03-2720152015-07-01
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cctc.201500328
 Degree: -

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Title: ChemCatChem
  Other : ChemCatChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: 6 Volume / Issue: 7 (22) Sequence Number: - Start / End Page: 3725 - 3730 Identifier: ISSN: 1867-3880
CoNE: https://pure.mpg.de/cone/journals/resource/1867-3880