Preparation and Characterization of Advanced PtRu/Ti0.7Mo0.7O2 Catalysts for Direct Methanol Fuel Cells

Abstract

We report the new strategy by investigating the novel Ti0.7Mo0.3O2material can just as easily be used as a conductive support for PtRu for DMFCs to prevent not only the carbon corrosion but also improved activity of catalyst due to some functional advantages of novel Ti0.7Mo0.3O2support. The Ti0.7Mo0.3O2nanoparticle have good crystallinity with well-defined fringes corresponding to the 3.45 Å spacing value of the {101} plane of anatase TiO2, which were good according to the XRD pattern. The BET surface area measurements showed that the Ti0.7Mo0.3O2possessed 125 m2g-1Fig. 3 shows the TEM measurement of Ti0.7Mo0.3O2nanoparticle and Pt/Ti0.7Mo0.3O2, it can be observed that spherical PtRu alloy particles with an average particle size of 2-4 nm were uniformly anchored on the surface of Ti0.7Mo0.3O2support. More importantly, we found that there has a strong metal support interaction (SMSI) between the PtRu noble metal and the Ti0.7Mo0.3O2support material - resulting in facile electron donation from the Ti0.7Mo0.3O2support to PtRu metal with an ultimate drastic decrease in the d-band vacancy of Pt. Thus, the unique structural features of the Ti0.7Mo0.3O2support and the PtRu/Ti0.7Mo0.3O2catalyst appear to provide a suitable combination favoring that promise for the high performance of methanol oxidation, CO-tolerance in DMFCs.