Patent ID: 9120087
Filing Date: 2015-09-01
Classification: B01J,H01M,Y02E,Y02P

Abstract:
1. A catalyst for a fuel cell, comprising: a transition element core comprising at least one selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Cu, Zn, W, and Mo; and a surface layer comprising a platinum-transition element alloy, the platinum-transition element alloy having an average particle diameter ranging from 1 to 5 nanometers, and said surface layer existing on a surface of said transition element core, wherein an amount of platinum in the platinum-transition element alloy has a concentration gradient that decreases from the outer surface of the surface layer toward said transition element core; and wherein the concentration of the transition element in the platinum-transition element alloy at the outer surface of the surface layer is greater than zero, and the concentration of the transition element at the transition element core is approximately 100% and further wherein the transition element in the core is the same as the transition element in the platinum-transition element alloy in the surface layer.