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Photoelectron diffraction study of Rh nanoparticles growth on Fe3O4/Pd(111) ultrathin film

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Abstract

Metallic nanoparticles (NPs) supported on oxides thin films are commonly used as model catalysts for studies of heterogeneous catalysis. Several 4d and 5d metal NPs (for example, Pd, Pt and Au) grown on alumina, ceria and titania have shown strong metal support interaction (SMSI), for instance the encapsulation of the NPs by the oxide. The SMSI plays an important role in catalysis and is very dependent on the support oxide used. The present work investigates the growth mechanism and atomic structure of Rh NPs supported on epitaxial magnetite Fe3O4(111) ultrathin films prepared on Pd(111) using the Molecular Beam Epitaxy (MBE) technique. The iron oxide and the Rh NPs were characterized using X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction and photoelectron diffraction (PED). The combined XPS and PED results indicate that Rh NPs are metallic, cover approximately 20 % of the iron oxide surface and show height distribution ranging 3–5 ML (monolayers) with essentially a bulk fcc structure.

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Acknowledgments

We would like to acknowledge the Brazilian research agencies Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP) and Conselho Nacional de Desenvolvimento Ciêntífico e Tecnológico (CNPq) for financial support and the Brazilian Sinchrotron Light Source (LNLS).

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Authors and Affiliations

  1. Departamento de Física Aplicada, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Brazil

    G. J. P. Abreu, L. H. de Lima, R. Landers & A. de Siervo

  2. Universidade Federal de Goiás, Campus Jataí, Goiânia, Goiás, Brazil

    A Pancotti

  3. Laboratório Nacional de Luz Síncrotron, Campinas, São Paulo, Brazil

    A. de Siervo

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  1. G. J. P. Abreu
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  2. A Pancotti
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Correspondence to G. J. P. Abreu.

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Abreu, G.J.P., Pancotti, A., de Lima, L.H. et al. Photoelectron diffraction study of Rh nanoparticles growth on Fe3O4/Pd(111) ultrathin film. J Nanopart Res 15, 1510 (2013). https://doi.org/10.1007/s11051-013-1510-z

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