A core/shell catalyst for a fuel cell with enhanced oxygen reduction activity

摘要

A fuel cell catalyst comprises a support of an oxide or a doped oxide of a metal M, a PdxM core catalyst deposited directly upon the support where x is greater than 1, and a Pt shell catalyst deposited directly upon the PdxM core catalyst. The metal M may be Nb, Ta, or Zr. The support may comprise NbO2 or NbMyOz, where y is less than 1 and z is greater than or equal to 2.