Structure and Activity of Carbon-Supported Pt−Co Electrocatalysts for Oxygen Reduction

摘要: Carbon-supported Pt−Co electrocatalysts in the Pt:Co atomic ratio 85:15, mainly for application polymer electrolyte fuel cells, have been prepared by different methods. The materials were tested single cells with respect to oxygen reduction reaction and their performances compared. Of several methods considered, preparation of electrocatalyst via deposition a Co precursor on previously formed carbon-supported platinum gave best results. By increasing content, decrease metal particle size an improvement activity ORR these catalysts was observed. For 75:25, good stability upon cycling also found.