Application Of Phthalocyanine Compounds As Direct Methanol Fuel Cell Catalysts

The cocatalyst of MPc-Pt/C were prepared by supporting MPc (Metal-phthalocyanine, M=Fe、Mo、Ni) on Pt/C. And two kinds of FePc-Pt/C were prepared with different atomic percent of Pt:M. Then they were heat-treated in inert gas environment, a series of MPc-Pt/C cocatalysts were gained.The cocatalyst structure was characterized via XRD、TEM、XPS、ICP. XRD shows that Pt and MPc are from mechanical blending to solid solution phase at low heat-treated temperatures, and become to intermetalic compound at a high temperature. The alloy is useful to impove the oxygen reduction reaction activity. TEM reveals that both Pt and MPc particals can support on carbon symmetrically, as the heat-treated temperature increasing, the partical size of catalysts are increase and become uniform dispersion. The results of ICP tell that, the atomic percent of Pt with M in MPc-Pt/C are same as original. XPS shows that Pt, M and N on the surfaces of catalysts are change for the temperature. At the same time, there are strong interactions among these element.The electrochemical behaviours of the catalyst were investigated in detail by CV-Cyclic Voltammetry(CV) and rotating disk electrode(RDE) measurements. We found different heat-treated temperatures、species of central metal and atomic percent of Pt:M are all have crucial impact on the electrical properties of the MPc-Pt/C catalysts.