METHANOL- AND CARBON MONOXIDE-RESISTANT BIMETALLIC ELECTRO CATALYSTS APPLIED IN POLYMERIC ELECTROLYTE FUEL CELLS

The present invention refers to the application of bimetallic material of the OsyRux (CO)n type, which are synthesised by any method in organic, aliphatic and aromatic solvents, and in reducing, inert and oxidising atmospheres without solvents, such as electrodes (anodes and cathodes) in polymeric e...

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Main Authors OMAR JIMENEZ SANDOVAL, EDGAR JESUS BORJA ARCO, ROBERTO HERNANDEZ CASTELLANOS, JORGE URIBE GODINEZ
Format Patent
LanguageEnglish
Spanish
Published 21.06.2010
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Summary:The present invention refers to the application of bimetallic material of the OsyRux (CO)n type, which are synthesised by any method in organic, aliphatic and aromatic solvents, and in reducing, inert and oxidising atmospheres without solvents, such as electrodes (anodes and cathodes) in polymeric electrolyte fuel cells (type PEM) using hydrogen or aliphatic alcohols as fuel. Said materials have a performance substantially higher than that of platinum, which is the material used as anode in a commercial manner: when the used hydrogen fuel has concentrations of carbon monoxide (CO) of up to 0.5%, the platinum is easily deactivated by said polluting agent, while the novel bimetallic materials are considerably resistant. The bimetallic materials show methanol tolerance and may also show resistance properties to ethanol and other aliphatic alcohols, upon being used as cathodes in cells supplied directly with this compounds (DEFC, for instance). La invención se refiere a la aplicación de materiales bimetálicos del tipo OsyRux(CO)n, sintetizados por cualquier método en disolventes orgánicos alifáticos y aromáticos, así como en ausencia de disolventes en atmósferas reductoras, inerte y oxidantes, como electrodos (ánodos y cátodos) en celdas de combustible de electrolito polimérico (tipo PEM) que utilicen hidrógeno o alcoholes alifáticos como combustible. Estos materiales presentan un desempeño muy superior al platino, que es el material usado como ánodo de manera comercial: cuando el combustible de hidrógeno utilizado presenta concentraciones de monóxido de carbono (CO) de hasta 0.5%, el platino es fácilmente desactivado por este agente contaminante, mientras que los nuevos materiales bimetálicos son considerablemente resistentes. Los materiales bimetálicos muestran tolerancia al metanol y pueden mostrar también propiedades de resistencia al etanol y otros alcoholes alifáticos, al ser empleados como cátodos en celdas alimentadas directamente con estos compuestos (DEFC, por ejemplo).
Bibliography:Application Number: MX20080016440