Electrooxidation of methanol on Pt-Ru catalysts supported on different carbon materials

摘要

The preparation of highly dispersed Pt-Ru electrocatalysts with high metal loadings on carbonaceous supports is one of the current goals in DMFC research. In this regard it is of interest to determine what type of carbon materials is the most suitable as a support. Carbon is not only used to conduct electrons and serves as a catalyst carrier, it also stabilises the three-phase boundary and affects the morphology of the dispersed particles. Use of various carbon blacks, graphite, carbon nanofibers and carbon nanotubes as catalyst support has been reported. In this communication, we compare the electrochemical performance of similarly prepared Vulcan XC-72 carbon black and multi-walled carbon nanotube supported Pt-Ru catalysts for methanol electro-oxidation.