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Highly active PtSn/C catalyst was prepared by a polyol method. The catalyst was reduced in H 2 /Ar atmosphere at 600°C for 2h in order to obtain different metallic phase. TEM images show uniform dispersion of spherical metal nanoparticles with average diameters of 1.8 and 3.9nm for the as-prepared and treated catalysts, respectively. UV–vis spectrophotometry is employed to monitor the preparation...
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