Preparation of Pt-based ternary catalyst as cathode material for proton exchange membrane fuel cell by solution route method

► Pt-CoO-Cr2O3 as catalysts for PEMFC was prepared by the solution route method. ► It was supported on untreated and treated carbon. ► Particles size were 3.97 nm for untreated carbon and 1.93 nm for treated carbon. ► Pt-CoO-Cr2O3/C catalyst supported on treated carbon exhibited the highest performance among the prepared ternary alloy catalysts.