US Patent 7955755 - Metal nanoparticles for fuel cell cathode

http://www.freepatentsonline.com/7955755.html

This patent from QuantumSphere teaches an improved efficiency fuel cell cathode formed from metal oxide coated metal nanoparticles. Claim 1 reads:

1. A direct methanol fuel cell cathode comprising a composition supported on a conductive substrate, the composition comprising:

(i) reactive nano-particles each consisting essentially of (a) a core of metal and/or metal alloy and (b) a shell of an oxide of the metal and/or metal alloy in the core;

(ii) platinum and/or platinum alloy particles devoid of an oxide shell, and

(iii) an ionomer.