Solid-phase synthesis of graphitic carbon nanostructures from iron and cobalt gluconates and their utilization as electrocatalyst supports

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Títol: Solid-phase synthesis of graphitic carbon nanostructures from iron and cobalt gluconates and their utilization as electrocatalyst supports
Autors: Sevilla Solís, Marta | Salinas Martínez de Lecea, Concepción | Valdés-Solís Iglesias, Teresa | Morallon, Emilia | Fuertes Arias, Antonio Benito
Grups d'investigació o GITE: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medioambiente
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales | Instituto Nacional del Carbón (España)
Paraules clau: Carbon materials | Electrocatalysts | Fuel cells
Àrees de coneixement: Química Física
Data de creació: 27-de setembre-2007
Data de publicació: 10-de gener-2008
Editor: Royal Society of Chemistry
Citació bibliogràfica: SEVILLA SOLÍS, Marta, et al. “Solid-phase synthesis of graphitic carbon nanostructures from iron and cobalt gluconates and their utilization as electrocatalyst supports”. Physical Chemistry Chemical Physics. Vol. 10, Issue 10 (2008). ISSN 1463-9076, pp. 1433-1442
Resum: We present a novel and facile synthesis methodology for obtaining graphitic carbon structures from Fe(II) and Co(II) gluconates. The formation of graphitic carbon can be carried out in only one step by means of heat treatment of these organic salts at a temperature of 900 °C or 1000 °C under inert atmosphere. This process consists of the following steps: (a) pyrolysis of the organic gluconate and its transformation to amorphous carbon, (b) conversion of Fe2+ and Co2+ ions to Fe2O3 and CoO and their subsequent reduction to metallic nanoparticles by the carbon and (c) conversion of a fraction of formed amorphous carbon to graphitic structures by Fe and Co nanoparticles that act as catalysts in the graphitization process. The removal of the amorphous carbon and metallic nanoparticles by means of oxidative treatment (KMnO4 in an acid solution) allows graphitic carbon nanostructures (GCNs) to be selectively recovered. The GCNs thus obtained (i.e. nanocapsules and nanopipes) have a high crystallinity as evidenced by TEM/SAED, XRD and Raman analysis. In addition, we used these GCNs as supports for platinum nanoparticles, which were well dispersed (mean Pt size ~2.5–3.2 nm). Most electrocatalysts prepared in this way have a high electrocatalytical surface area, up to 90 m2 g-1 Pt, and exhibit high catalytic activities toward methanol electrooxidation.
Patrocinadors: The financial support for this research work provided by the Spanish MCyT (MAT2005-00262, MAT2004-01479 and FEDER) is gratefully acknowledged. M.S. acknowledges the assistance of the Spanish MCyT in awarding a FPU grant.
URI: http://hdl.handle.net/10045/10478
ISSN: 1463-9076 (Print) | 1463-9084 (Online)
DOI: 10.1039/b714924g
Idioma: eng
Tipus: info:eu-repo/semantics/article
Revisió científica: si
Apareix a la col·lecció: INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

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