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Direct synthesis of graphitic carbon nanostructures from saccharides and their use as electrocatalytic supports

AuthorsSevilla Solís, Marta ; Sanchís, C.; Valdés-Solís Iglesias, Teresa ; Morallón, E.; Fuertes Arias, Antonio Benito
KeywordsPolymer electrolyte membrane
Solid-phase synthesis
Catalytic graphitization
Issue Date4-Mar-2008
CitationCarbon 46(6): 931-939 (2008)
AbstractAn easy method is described for fabricating graphitic carbon nanostructures (GCNs) from a variety of saccharides; i.e., a monosaccharide (glucose), a disaccharide (sucrose) and a polysaccharide (starch). The synthesis scheme consists of: (a) impregnation of saccharide with Ni or Fe nitrates, (b) heat treatment under inert atmosphere (N2) up to 900°C or 1000°C and (c) oxidation in liquid phase to selectively recover the graphitic carbon. This procedure leads to GCNs with a variety of morphologies: nanopipes nanocoils and nanocapsules. Such GCNs have a high crystallinity, as shown by TEM/SAED, XRD and Raman analysis. The GCNs were used as supports for platinum nanoparticles, which were well dispersed (Mean Pt size ~2–3 nm). Electrocatalysts thus prepared have electrocatalytic surface areas in the 70–95 m2 g−1 Pt range and exhibit high catalytic activities towards methanol electrooxidation.
Description9 pages, 6 figures, 2 tables.-- Printed version published May 2008.-- Supporting information (Suppl. figures S1-S6, tables S1-S2) available at the publisher's site.
Publisher version (URL)http://dx.doi.org/10.1016/j.carbon.2008.02.019
Appears in Collections:(INCAR) Artículos
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