Composite materials

摘要

A mixed metal oxide material of tantalumand titanium is provided for use in a fuel cell. The material may comprise between 1 and 20 at. % tantalum. The mixed metal oxide may form the core of a core-shell composite material, used as a catalyst support, in which a catalyst such as platinum forms the shell. The catalyst may be applied as a single monolayer, and is preferably between 6.5 and 9.3 monolayers thick.

主权项

1. A core-shell catalyst consisting of a core particle and a shell catalyst, wherein said core particle has a diameter of from 10-50 nm and comprises a mixed metal oxide material of titanium and tantalum, the mixed metal oxide material comprising between 1 and 20 atomic % titanium, based on metal content, and wherein said shell catalyst comprises 1 to 20 monolayers of a catalyst material.