High temperature operation of direct ethanol fuel cells with Nafion-TiO2 membranes and PtSn/C electrocatalysts

R. A. Isidoro, B. R. Matos, M. A. Dresch, E. V. Spinacéa, M. Linardi, Enrico Traversa, F. C. Fonseca, E. I. Santiago

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

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 130°C. 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 80-130°C temperature range. Polarization curves showed an enhanced performance (maximum power density of ∼50 mW cm-2) for DEFC using combined PtSn/C (60:40) electrocatalyst and Nafion-TiO2 (10 wt%) operating at 130°C.

Original languageEnglish (US)
Title of host publicationECS Transactions - Proton Exchange Membrane Fuel Cells 9
Pages757-764
Number of pages8
Edition1 PART 1
DOIs
StatePublished - Dec 1 2009
Event9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC 9) - 216th Meeting of the Electrochemical Society - Vienna, Austria
Duration: Oct 4 2009Oct 9 2009

Publication series

NameECS Transactions
Number1 PART 1
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC 9) - 216th Meeting of the Electrochemical Society
CountryAustria
CityVienna
Period10/4/0910/9/09

ASJC Scopus subject areas

  • Engineering(all)

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