Patent ID: 9577269
Date: 2017-02-21
CPC Classifications: H01M,Y02E

Claim:
1. A catalytic material comprising: (i) a support material; and (ii) a thin film catalyst coating having an inner face adjacent to the support material and an outer face, the thin film catalyst coating having a mean thickness of ≦8 nm, wherein at least 40% of the support material surface area is covered by the thin film catalyst coating, the thin film catalyst coating comprises a first metal selected from the platinum group metals and one or more second metals different to the first metal and are selected from the group consisting of transition metals, rare earth metals, alkali metals, alkaline earth metals, Group IVA metals and Group VA metals, or an oxide thereof, the atomic percentage of first metal in the thin film catalyst coating is not uniform through the thickness of the thin film catalyst coating, and the atomic percentage of the first metal at the outer face of the thin film catalyst coating is 50-100 at % and wherein the atomic percentage of the first metal at the outer face of the thin film catalyst coating is greater than the atomic percentage of the first metal at the inner face of the thin film catalyst coating.