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This paper presents the behavior of 20wt.% PtSn supported catalysts as anodes for direct ethanol fuel cell (DEFC), which is fed with an aqueous ethanol solution. PtSn nanoparticles with different Pt:Sn ratios (1:1 and 3:1) were supported on carbon black and carbon nanofibers. Physicochemical characterization showed high particle dispersion onto the carbon supports and similar particle size (around...