Open AccessHigh Temperature Operation of Direct Ethanol Fuel Cells with Nafion-TiO2 Membranes and PtSn/C Electrocatalysts
Author(s) -
Roberta A. Isidoro,
Bruno R. Matos,
Mauro André Dresch,
Estevam V. Spinacé,
Enrico Traversa,
Fábio C. Fonseca,
Elisabete I. Santiago
Publication year - 2009
Publication title -
ecs meeting abstracts
Language(s) - English
Resource type - Journals
eISSN - 2151-2035
pISSN - 1091-8213
DOI - 10.1149/ma2009-02/10/911
Subject(s) - nafion , membrane , ethanol , fuel cells , chemical engineering , proton exchange membrane fuel cell , direct ethanol fuel cell , materials science , chemistry , electrochemistry , electrode , organic chemistry , engineering , biochemistry
In this study, both PtSn/C electrocatalysts and composites electrolytes based on Nafion and mesoporous titania (Nafion-TiO2) were evaluated in direct ethanol fuel cell operating at 130C. PtSn/C catalysts with different compositions were prepared by alcohol-reduction process. The electrochemical activity of these electrocatalysts was verified by cyclic voltammetry and chronoamperometry measurements. Cast Nafion-TiO2 composites were characterized by differential scanning calorimetry and ac impedance spectroscopy. The water uptake of the composites was determined by gravimetry. Membrane electrode assemblies composed by Nafion-TiO2 electrolyte and PtSn/C anode were evaluate in DEFC operating in 80-130C temperature range. Polarization curves showed an enhanced performance (maximum power density of ~50 mW cm) for DEFC using combined PtSn/C (60:40) electrocatalyst and Nafion-TiO2 (10 wt%) operating at 130C.
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