Patent ID: 8663866
Filing Date: 2014-03-04
Classification: H01M,Y02E

Abstract:
1. A membrane electrode assembly comprising: an anode, a cathode an ionomer membrane disposed between said anode and cathode, and a catalytically active component capable of decomposing hydrogen peroxide disposed within the membrane electrode assembly in a location selected from the group of within the anode, within the cathode, within the ionomer membrane, abutting the anode, abutting the cathode, abutting the ionomer membrane, and combinations thereof, said catalytically active component comprising colloidal particles, wherein the colloidal particles comprise particles of a metal oxide, a stabilizer, which stabilizer is one or more ions containing boron and which modifies the outer surface of the particles of metal oxide, and at least one catalyst from the group of cerium, platinum, lanthanum, gadolinium, iron, ruthenium, and combinations thereof, which catalyst modifies the outer surface of the particles of metal oxide; such that the colloidal particles are bi-metallic or multi-metallic surface-modified particles of metal oxide containing two or more than two different metals or metalloids on their surface, and wherein at least 10% and up to 100% of the surface sites on the particles of metal oxide are occupied by the stabilizer armor the catalyst.