High utilization supported catalyst compositions with improved resistance to poisoning and corrosion

摘要

A supported catalyst composition comprising a metal catalyst nanodispersed in a support that is a hard disordered carbon or carbon glass; or a partially graphitized or disordered carbon intercalation complex; or house-of-cards transition metal dichalcogenide such as molybdenum disulfide (MoS₂). Also disclosed are embodiments based on the above supported catalyst compositions, wherein the metal catalyst is Pt or Pt alloy, and wherein the pores comprised in the support are engineered to provide selective access to H₂, but not to larger molecules, such as CO or H₂O. Disclosed are methods for improving catalyst utilization, resistance to poisoning, and resistance of catalyst supports to corrosion-as well as products related thereto. Also disclosed is an MEA that comprises the supported, nanodispersed Pt and Pt alloy catalyst compositions of this invention, and a fuel cell that contains such an MEA.