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Issue 20, 2011
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Synthesis, electrochemical characterization and molecular dynamics studies of surface segregation of platinum nano-alloy electrocatalysts

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Abstract

Alloy Pt–M (M = Co, Ni) nanocatalysts, supported on carbon Vulcan XC-72, were synthesized using the carbonyl chemical route. A high dispersion on such substrate was revealed by transmission electron microscopy (TEM). Alloy formation on the nanometre scale length was shown by high-resolution transmission microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDX) on a nanoparticle. The metal M in Pt–M nanoalloys segregates preferentially on the nanoparticles' surface, as determined by the hydrogen adsorption electrochemical reaction. An increased tolerance towards methanol of such nanoalloy materials was observed for the oxygen reduction reaction (ORR) in acid media. To better understand the structure and segregation phenomena of these nanoalloys, molecular dynamics (MD) with a self-optimized reactive force field was applied.

Graphical abstract: Synthesis, electrochemical characterization and molecular dynamics studies of surface segregation of platinum nano-alloy electrocatalysts

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Publication details

The article was received on 03 Nov 2010, accepted on 09 Mar 2011 and first published on 05 Apr 2011


Article type: Paper
DOI: 10.1039/C0CP02384A
Citation: Phys. Chem. Chem. Phys., 2011,13, 9201-9208

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    Synthesis, electrochemical characterization and molecular dynamics studies of surface segregation of platinum nano-alloy electrocatalysts

    E. Favry, D. Wang, D. Fantauzzi, J. Anton, D. S. Su, T. Jacob and N. Alonso-Vante, Phys. Chem. Chem. Phys., 2011, 13, 9201
    DOI: 10.1039/C0CP02384A

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