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Categories: advanced materials, energy

BSA 04-27: Platinum and Platinum Alloy- Coated Palladium and Palladium Alloy Particles

BNL Reference Number: BSA 04-27

Patent Status: U.S. Patent Number 7,691,780 was issued on April 26, 2010

Summary

High resolution electron micrograph of a palladium nanoparticle coated with a monolayer of platinum

Platinum is an excellent catalyst for many reactions. However, it is also very expensive. The catalytic activity per gram of platinum can be increased by using a particle composite consisting of an atomically thin layer of the metal on a palladium alloy particle. When used as an electrocatalyst for the oxygen reduction reaction, this structure exhibits up to twenty times the platinum mass catalytic activity of commercially available platinum/carbon electrocatalysts. These structures can be used in fuel cells and other electrocatalytic or heterogeneous catalytic applications.

Description

These particle composites comprise a palladium or palladium-alloy particle or nanoparticle substrate coated with an atomic submonolayer, monolayer, bilayer, or trilayer of zerovalent platinum atoms.

Journal Publication

• Core-Protected Platinum Monolayer Shell High-Stability Electrocatalysts for Fuel-Cell Cathodes

Press Releases

• New Highly Stable Fuel-Cell Catalyst Gets Strength from its Nano Core

Have Questions?

For more information about this technology, contact Kimberley Elcess, (631) 344-4151.