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Flame-made Alumina Supported Pd–Pt Nanoparticles: Structural Properties and Catalytic Behavior in Methane Combustion

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Bimetallic palladium–platinum nanoparticles supported on alumina were prepared by flame spray pyrolysis. The as-prepared materials were characterized by scanning transmission electron microscopy (STEM), CO chemisorption, nitrogen adsorption (BET), X-ray diffraction (XRD), temperature programmed reduction (TPR), thermogravimetric analysis (TGA) and extended X-ray absorption fine structure (EXAFS) spectroscopy. The materials were tested for the catalytic combustion of methane with a focus on the thermal stability of the noble metal particles. After flame synthesis the noble metal components of the materials were predominantly in oxidized state and finely dispersed on the alumina matrix. Reduction afforded small bimetallic Pd–Pt alloy particles (< 5 nm) supported on Al2O3 ceramic nanoparticles. The addition of small amounts of platinum made the palladium particles more resistant against sintering at high temperatures and further lowered the deactivation observed during methane combustion.

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Authors and Affiliations

  1. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zentrum, Swiss Federal Institute of Technology, CH-8092, Zurich, Switzerland

    Reto Strobel, Adrian Camenzind & Sotiris E. Pratsinis

  2. Department of Chemistry and Applied Biosciences, ETH Hönggerberg, Swiss Federal Institute of Technology, CH-8093, Zurich, Switzerland

    Reto Strobel, Jan-Dierk Grunwaldt & Alfons Baiker

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  1. Reto Strobel
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  2. Jan-Dierk Grunwaldt
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  3. Adrian Camenzind
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  4. Sotiris E. Pratsinis
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  5. Alfons Baiker
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Correspondence to Alfons Baiker.

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Strobel, R., Grunwaldt, JD., Camenzind, A. et al. Flame-made Alumina Supported Pd–Pt Nanoparticles: Structural Properties and Catalytic Behavior in Methane Combustion. Catal Lett 104, 9–16 (2005). https://doi.org/10.1007/s10562-005-7429-y

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  • DOI: https://doi.org/10.1007/s10562-005-7429-y

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