Preparation and characterization of high metal content Pt–Ru alloy catalysts on various carbon blacks for DMFCs

High metal content Pt–Ru alloy catalysts (80 and 90 wt.%) with various carbons were prepared by the colloidal method without increasing particle size. As increasing the specific areas of supporting materials, catalysts exhibited homogeneous dispersions. The 90 wt.% Pt–Ru/Ketjen Black showed the best performance as the anode catalyst in unit cell and the 80 wt.% Pt–Ru/Ketjen Black in electrochemical experiments. This difference comes from types of electrolytes, i.e. liquid and solid.