Selective Syntheses and Electrochemical Characterization of Platinum Nanocubes and Nanotetrahedrons/Octahedrons

Patrick Urchaga (1) , Steve Baranton (1) , Teko W. Napporn (1) , Christophe Coutanceau (1)

1 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]

Platinum nanocubes and tetrahedrons/octahedrons were synthesized by different methods using different surfactants (tetradecyltrimethylammonium bromide (TTAB) and sodium polyacrylate). Transmission electron microscopy (TEM) investigations show high selectivity in shape and low size dispersion. However, the small nuclei observed at the surface of some nanocubes synthesized using the TTAB method is not yet clarified. The presence of such small particles could be explained by a double nucleation or different growth processes which might occur during synthesis. Electrochemical characterizations indicated that particles exhibited ca. 60% of oriented surface domains. Cyclic voltammetry and adatom adsorption displayed a very good agreement with TEM results.

Mots clés: Electrochemistry; Nanocubes; Nanooctahedrons nanoparticles; Nanotetrahedron; Platinum; Surface domains

Domaines: Catalyse

Patrick Urchaga, Steve Baranton, Teko W. Napporn, Christophe Coutanceau. Selective Syntheses and Electrochemical Characterization of Platinum Nanocubes and Nanotetrahedrons/Octahedrons . Electrocatalysis, 2010, 1 pp.3-6 ⟨10.1007/s12678-009-0002-5⟩. ⟨hal-01379510⟩