nanostructured ptxmy catalyst for pemfc cells having high activity and moderate h2o2 production

摘要

1/1 Summary "nanostructured ptxmy catalyst for pemfc cells having high activity and moderate h2o2 production" The invention relates to a method of producing a catalyst (3,4) for a ptxmy, pemfc, m being a metal of transition, including the following steps: deposition of ptxmy nanostructures on a substrate; annealing of nanostructures; deposition of a ptxmy layer on the surface of the nanostructures formed in this manner and chemical leaching of the metal m. The invention also relates to the catalyst obtained by said method. the use of said catalyst in a pemfc cathode combines the advantages resulting from pure core / shell ptxmy nanostructures, the nanostructures (i.e., which offer higher orr activity than that of pure pt and good stability) and those that result from a slit ptxmy layer (ie reduced h2o2 production).