VILMARIA APARECIDA RIBEIRO
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Artigo IPEN-doc 20193 Preparation of PtSn/C electrocatalysts by as alcohol-reduction process using different conditions for ethanol electro-oxidation2014 - RIBEIRO, V.A.; SEKOL, R.C.; TAYLOR, A.D.; OLIVEIRA NETO, A.; SPINACE, E.V.PtSn/C electrocatalysts were prepared by an alcoholreduction process using Pt(C5H7O2)2 and SnCl4•5H2O as metal precursors, a mixture of ethylene glycol:water as both a solvent and reducing agent and Carbon Vulcan XC72 as support. The electrocatalysts were prepared with 20 wt% of metal content and Pt:Sn atomic ratio of 50:50 using different conditions: under reflux (RFX) at 160°C for 3 h and in an autoclave (ATC) at 200°C under autogeneous pressure for 30 min. The obtained PtSn/C electrocatalysts were characterized by X-ray diffraction and cyclic voltammetry. The electro-oxidation of ethanol was evaluated by chronoamperometry in acid medium. A similar performance was observed for commercial PtSn/C BASF and PtSn/C RFX while PtSn/C ATC showed a superior performance.Artigo IPEN-doc 17875 Preparation of PtSn/C electrocatalyst by successive reduction for ethanol electrooxidation2012 - RIBEIRO, VILMARIA A.; OLIVEIRA NETO, ALMIR; LINARDI, MARCELO; SPINACE, ESTEVAM V.Artigo IPEN-doc 17873 Preparation of Ni/carbon hydrids by hydrothermal carbonization and thermal treatment for application as supports for PtRu/C electrocatalysts2012 - TUSI, M.M.; POLANCO, N.S.O.; BRANDALISE, M.; RIBEIRO, V.A.; CORREA, O.V.; VILLALBA, J.C.; ANAISSI, F.J.; OLIVEIRA NETO, A.; SPINACE, E.V.