Patent ID: 9680161
Date: 2017-06-13
CPC Classifications: B22F,C22C,C22F,H01M,Y02E

Claim:
1. A noble metal-based electrocatalyst comprising: a bimetallic particle comprising a noble metal and a non-noble metal and having a polyhedral shape, the bimetallic particle comprising a surface-segregated composition where an atomic ratio of the noble metal to the non-noble metal is higher in a surface region and in a core region than in a sub-surface region between the surface and core regions, wherein the core region has a size of from about 40% to about 60% of a size of the bimetallic particle, wherein the surface region has a thickness of from about 10% to about 30% of the size of the bimetallic particle, and wherein the sub-surface region has a thickness of from about 10% to about 50% of the size of the bimetallic particle.