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Issue 10, 2003
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Preparation of PtNi nanoparticles for the electrocatalytic oxidation of methanol

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Abstract

Carbon supported PtNi nanoparticles were prepared by hydrazine reduction of Pt and Ni precursor salts under different conditions, namely by conventional heating (PtNi-1), by prolonged reaction at room temperature (PtNi-2) and by microwave assisted reduction (PtNi-3). The nanocomposites were characterized by XRD, EDX, XPS and TEM and used as electrocatalysts in direct methanol fuel cell (DMFC) reactions. Investigations into the mechanism of PtNi nanoparticle formation revealed that platinum nanoparticle seeding was essential for the formation of the bimetallic nanoparticles. The average particle size of PtNi prepared by microwave irradiation was the lowest, in the range of 2.9–5.8 nm. The relative rates of electrooxidation of methanol at room temperature as measured by cyclic voltammetry showed an inverse relationship between catalytic activity and particle size in the following order PtNi-1 < PtNi-2 < PtNi-3.

Graphical abstract: Preparation of PtNi nanoparticles for the electrocatalytic oxidation of methanol

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Publication details

The article was received on 20 Jun 2003, accepted on 30 Jul 2003 and first published on 13 Aug 2003


Article type: Paper
DOI: 10.1039/B307040A
Citation: J. Mater. Chem., 2003,13, 2555-2560
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    Preparation of PtNi nanoparticles for the electrocatalytic oxidation of methanol

    T. C. Deivaraj, W. Chen and J. Y. Lee, J. Mater. Chem., 2003, 13, 2555
    DOI: 10.1039/B307040A

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