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Title: Synthesis of metal-metal oxide catalysts and electrocatalysts using a metal cation adsorption/reduction and adatom replacement by more noble ones

Patent ·
OSTI ID:1176256

The invention relates to platinum-metal oxide composite particles and their use as electrocatalysts in oxygen-reducing cathodes and fuel cells. The invention particularly relates to methods for preventing the oxidation of the platinum electrocatalyst in the cathodes of fuel cells by use of these platinum-metal oxide composite particles. The invention additionally relates to methods for producing electrical energy by supplying such a fuel cell with an oxidant, such as oxygen, and a fuel source, such as hydrogen. The invention also relates to methods of making the metal-metal oxide composites.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-98CH10886
Assignee:
Brookhaven Science Associates, LLC (Upton, NY)
Patent Number(s):
7,704,918
Application Number:
11/760,051
OSTI ID:
1176256
Country of Publication:
United States
Language:
English

References (5)

Electrocatalytic Activity of Cubic Sodium Tungsten Bronze journal January 1981
Metal monolayer deposition by replacement of metal adlayers on electrode surfaces journal March 2001
Modeling oxide-metal interfaces from density-functional theory: Platinum adsorption on tetragonal zirconia journal November 2003
Tungsten bronze fuel cell catalysts journal January 1968
Self-Assembling Solid Oxide Fuel Cell Materials:  Mesoporous Yttria-Zirconia and Metal-Yttria-Zirconia Solid Solutions journal September 2000