ELIANA MARIA ARICO
3 resultados
Resultados de Busca
Agora exibindo 1 - 3 de 3
Artigo IPEN-doc 09561 Synthesis and characterization of eletrocatalyst powders for application in PEM fuel cells2003 - FRANCO, E.G.; ARICO, E.M.; LINARDI, M.; ROTH, C.; MARTZ, N.; FUESS, H.The Bonnemann method was chosen to synthesize carbon-supported Pt-Ru-Mo electrocatalyst powders, as this method leads to highly-dispersed nanoparticles with an average particle size of approximately 2 nm. Structural characterization of the resulting catalysts was done by the following techniques: X-rays fluorescence analysis (XFA) and nanosize-energy dispersive X-rays analysis (nano-EDX) to obtain information about noble metal loading and composition as well as X-rays diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) to determine structure, dispersion and crystallite size of the nanoparticles. X-rays photoelectron spectroscopy (XPS) was applied to detect amorphous phases and to determine the oxidation states of Pt, Ru and Mo. The morphology of membrane electrode assemblies, prepared by a spraying technique, was checked by scanning electron microscopy (SEM). For the determination of the electrocatalytic activity E/i curves in single cell arrangements were recorded using both H2/CO mixtures and methanol as feed gases.Artigo IPEN-doc 09087 Synthesis of electrocatalysts by the Boennemann method for the oxidation of methanol and the mixture Hsub(2)/CO in a proton exchange membrane fuel cell2002 - FRANCO, E.G.; OLIVEIRA NETO, A.; LINARDI, M.; ARICO, E.M.Artigo IPEN-doc 09169 Electro-oxidation of methanol and ethanol on Pt-Ru/C and Pt-Ru-Mo/C electrocatalysts prepared by Boennemann's method2003 - OLIVEIRA NETO, A.; FRANCO, E.G.; ARICO, E.M.; LINARDI, M.; GONZALEZ, E.R.