Electrochemical catalysts for fuel cells
AssigneesOneD Material, Inc., Sharp Kabushiki Kaisha
InventorsYimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan, Mutsuko Komoda, Hirotaka Mizuhata, Takenori Onishi
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Abstract
The present invention relates to electrochemical catalyst particles, including nanoparticles, which can be used membrane electrode assemblies and in fuel cells. In exemplary embodiments, the present invention provides electrochemical catalysts supported by various materials. Suitably the catalysts have an atomic ratio of oxygen to a metal in the nanoparticle of about 3 to about 6.
Claims15
An electrochemical catalyst supported by a network of interconnected nanowires, the electrochemical catalyst comprising a nanoparticle comprising Pt and Ru, or an alloy including Pt and Ru, wherein the atomic ratio of oxygen in the nanoparticle to Ru in the nanoparticle is in the range of more than 3 to not more than 6.
An electrochemical catalyst supported by a network of interconnected nanowires, the electrochemical catalyst comprising a Pt:Ru nanoparticle, wherein the atomic ratio of oxygen to Ru in the nanoparticle is more than 3 to not more than 6, the percentage of metallic ruthenium is less than about 30%, and the percentage of metallic platinum is about 70% to about 90%.
Dependencies are inferred from the claim text.