Electrooxidation of methanol on different Pt-TiO2/C catalysts
Carbon supported Pt-TiO2 catalysts were prepared by different reductants (HCOOH^CHO, NaBH4). The Home-made Pt-Ti(VC catalysts were used for methanol oxidation in acidic solution. The catalysts prepared have been characterized by powder X-ray diffraction (XRD), cyclic voltammetry (CV),linear sweep voltammetry (LSV) and Amperometric I—t techniques. The catalysts prepared by different methods affected the particle size of Pt and the distribution of Pt on carbon support, and therefore the different electrocatalytic oxidation activity in methanol. The catalyst prepared by HCOOH had the highest electrocatalytic oxidation activity and stability for methanol among the catalysts prepared. Its electrocatalytic activity is 1.41 times and 1.76 times higher than that the catalysts prepared with HCHO and NaBH4 as reductant alone, respectively.
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