Preparation and characterization of Pt-WO3/C catalysts for direct ethanol fuel cells

Three co-impregnation/chemical reduction methods in acidic solutions of pH < 1,="" including="" ethylene="" glycol="" (eg),="" nabh4,="" and="" hcooh,="" were="" compared="" for="" pt-wo3/c="" catalysts.="" pt-wo3/c="" catalysts="" containing="" 10="" wt.%="" and="" 20="" wt.%="" platinum="" per="" carbon="" were="" prepared="" by="" the="" three="" methods;="" their="" morphology="" and="" electrocatalytic="" activities="" were="" characterized.="" the="" 20="" wt.%="" pt-wo3/c="" catalyst="" prepared="" by="" the="" co-impregnation/eg="" method="" presented="" the="" optimal="" dispersion="" with="" an="" average="" particle="" size="" of="" 4.6="" nm="" and="" subsequently="" the="" best="" electrocatalytic="" activity,="" and="" so,="" it="" was="" further="" characterized.="" its="" anodic="" peak="" current="" density="" for="" ethanol="" oxidation="" from="" linear="" sweep="" voltammetry="" (lsv)="" is="" 7.9="" ma·cm-2="" ,="" which="" is="" 1.4="" and="" 5.2="" times="" as="" high="" as="" those="" of="" the="" catalysts="" prepared="" by="" co-impregnation/nabh4="" and="" co-impregnation/hcooh="" reduction="" methods,="" 2.1="" times="" as="" high="" as="" that="" of="" the="" 10="" wt.%="" pt-wo3/c="" catalyst="" prepared="" by="" co-impregnation/eg="" method,="" respectively.="">