Carbon supported Pt nanocatalysts (Pt/C) are widely used in fuel cells. In this work

three kinds of Pt/C catalysts were successfully prepared via a chemical reduction method by using carbon black pretreated with different methods

i.e.

HNO3-pretreated carbon (Pt/C-HNO3)

H2O2-pretreated carbon (Pt/C-H2O2) and unpretreated carbon (Pt/C). The morphologies and properties of the as-prepared Pt/C catalysts were characterized by SEM

HR-TEM

CV and COad stripping. Pt nanoparticles were dispersed well in these three Pt/C catalysts with average particle size of 3.4

3.9 and 4.5 nm respectively. HR-TEM observation indicated that Pt/C-HNO3 possessed high-density of step atoms and COad stripping experiments showed that Pt/C-HNO3 exhibited the best anti-poisoning property. Comparing the catalytic activities of three as-prepared Pt/C catalysts toward ethanol electrooxidation with commercial Pt/C catalyst (Pt/C JM) showed that the as-prepared catalysts exhibited higher activity and stability than those of Pt/C JM and the order was Pt/C-HNO3>Pt/C-H2O2>Pt/C>Pt/C JM. Especially for Pt/C-HNO3

its activity and stability were 1.5 times and 1.9 times of those of Pt/C JM respectively.