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Tuning the Porosity of Bimetallic Nanostructures by a Soft Templating Approach

Authors

  • Anaïs Lehoux,

    1. Laboratoire de Chimie Physique, UMR 8000-CNRS, Université Paris-Sud, 91405 Orsay, France
    2. CNRS, Laboratoire de Chimie Physique, UMR 8000, 91405 Orsay, France
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  • Laurence Ramos,

    1. Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
    2. CNRS, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
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  • Patricia Beaunier,

    1. Laboratoire de Réactivité de Surface, UPMC Université Paris 6, UMR 7197-CNRS, 3 rue Galilée, 94200 Ivry, France
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  • Daniel Bahena Uribe,

    1. Department of Physics & Astronomy, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
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  • Philippe Dieudonné,

    1. Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
    2. CNRS, Laboratoire Charles Coulomb UMR 5221, F-34095, Montpellier, France
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  • Fabrice Audonnet,

    1. Institut Pascal, UMR 6602-CNRS, Université Blaise Pascal, F-63177 Aubière Cedex, France
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  • Arnaud Etcheberry,

    1. ILV-Institut Lavoisier de Versailles 45 rue des Etats-Unis UMR 8180-CNRS Université Versailles Saint-Quentin-en-Yvelines 78035 Versailles Cedex, France
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  • Miguel José-Yacaman,

    1. Department of Physics & Astronomy, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
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  • Hynd Remita

    Corresponding author
    1. Laboratoire de Chimie Physique, UMR 8000-CNRS, Université Paris-Sud, 91405 Orsay, France
    2. CNRS, Laboratoire de Chimie Physique, UMR 8000, 91405 Orsay, France
    • Laboratoire de Chimie Physique, UMR 8000-CNRS, Université Paris-Sud, 91405 Orsay, France.
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Abstract

Hexagonal mesophases made of oil-swollen surfactant-stabilized tubes arranged on a triangular lattice in water and doped with metallic salts are used as templates for the radiolytic synthesis of nanostructures. The nanostructures formed in this type of soft matrix are bimetallic palladium-platinum porous nanoballs composed of 3D-connected nanowires, of typical thickness 2.5 nm, forming hexagonal cells. Using electron microscopy and small-angle X-ray scattering it is demonstrated that the pore size of the nanoballs is directly determined by the diameter of the oil tube of the doped mesophases, which is varied in a controlled fashion from 10 to 55 nm. Bimetallic nanostructures composed of various proportions of palladium and platinum can be synthesized. Their alloy structure is studied using X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, and high-angular dark field scanning transmission electron microscopy experiments. The templating approach allows the synthesis of bimetallic nanoballs of tunable porosity and composition.

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