Catalysis, Metal-air electrochemical cell, Platinum, Nanoparticles
Metal-air batteries and fuel cells, etc.
The invention provides a method and device for promoting chemical reactions in a metal-air electrochemical cell. Au-Pt nanoparticles are of considerable interest in the area of methanol oxidation reaction (MOR), or in oxygen reduction reactions. The addition of Au to Pt affects its electronic structure, which can thus positively influence the MOR activity by promoting OH group formation. Based on this discovery, the present invention designs improved non-aqueous, metal-air electrochemical cells having a positive electrode that incorporates a catalyst comprising platinum-containing nanoparticles on a porous substrate. The nanoparticle can form a core-shell structure, which includes a core of non-precious metal and a shell comprising platinum and a second metal. The techniques of synthesizing these nanoparticles are also provided.
U.S. Published Patent Application 13/098653, filed on May 2, 2011
PCT Patent Application PCT/US2011/034780, filed on May 2, 2011
Y.-C. Lu, Z. Xu, H. A. Gasteiger, S. Chen, K. Hamad-Schifferli, and Y. Shao-Horn, “Platinum-Gold Nanoparticles: A Highly Active Bifunctional Electrocatalyst for Rechargeable Lithium-Air Batteries,” Journal of the American Chemical Society, 2010, 32 (135) 12170-12171.
Last revised: March 1, 2012
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