Platinum and tungsten containing electrocatalysts

Details Platinum and tungsten containing electrocatalysts Platinum and tungsten containing electrocatalysts

2005-12-06

2010-06-15

Rhee, Jane (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C502S182000, C502S183000, C502S313000, C502S314000

Reexamination Certificate

active

07736790

ABSTRACT:
The present teachings are directed toward electrocatalyst compositions of platinum, tungsten and at least a third metal for use in fuel cells. The electrocatalyst composition is composed essentially of platinum present in an atomic percentage ranging between about 20 percent and about 55 percent, tungsten present in an atomic percentage ranging between about 30 percent and about 75 percent, and at least a third metal present in an atomic percentage ranging between about 1 percent and about 40 percent. The third metal can be at least one member selected from the group consisting of scandium, vanadium, chromium, manganese, iron, cobalt, copper, zinc, yttrium, niobium, molybdenum, cadmium, tin, hafnium, tantalum and rhenium; additional fourth and fifth metals can also be present.

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