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Closed Access item Highly dispersed platinum nanoparticles on carbon nanocoils and their electrocatalytic performance for fuel cell reactions

Authors:Sevilla Solís, Marta
Sanchís, C.
Valdés-Solís Iglesias, Teresa
Morallón, E.
Fuertes Arias, Antonio Benito
Keywords:Carbon nanostructures, Pt nanoparticles, Electrocatalyst, Methanol electrooxidation, Voltammetry
Issue Date:1-Mar-2009
Citation:Electrochimica Acta 54(8): 2234-2238 (2009)
Abstract:Highly graphitic carbon nanocoils (GCNC) were synthesized through the catalytic graphitization of carbon microspheres obtained by the hydrothermal carbonization of different saccharides (sucrose, glucose and starch) and were used as a support for Pt nanoparticles. The Pt nanoparticles were deposited by means of a polymer mediated-polyol method. The Pt catalysts were characterized both physically (XRD, TEM, HRTEM and XPS) and electrochemically (electrooxidation of methanol in an acid medium). The electrocatalysts thus prepared show a high dispersion of Pt nanoparticles, with diameters in the 3.0–3.3 nm range and a very narrow particle size distribution. These catalytic systems possess high electroactive Pt surface areas (up to 85 m2 g−1 Pt) and they exhibit large catalytic activities towards methanol electrooxidation (up to 201 A g−1 Pt). Moreover, they have a high resistance against oxidation, which is considerably greater than that of the Pt/Vulcan system.
Description:5 pages, 4 figures, 1 table.-- Available online Nov 5, 2008.
Publisher version (URL):http://dx.doi.org/10.1016/j.electacta.2008.10.042
Appears in Collections:(INCAR) Artículos

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