Abstract:
1,165,677. Fuel cell electrodes. LEESONA CORP. 23 Sept., 1966 [30 Sept., 1965], No. 42458/66. Heading H1B. Electrodes are made by applying a mixture of a base metal and a hydrophobic polymer to a porous metal support, heating the resultant structure to bond or sinter the polymer and then replacing the exposed surface of the base metal with a more noble metal. The replacement can be (1) electrolytic; (2) by amalgamation with Hg followed by replacement of the Hg; (3) by using a multi-component or multi-phase base metal alloy, selectively corroding the components or phases and simultaneously or subsequently replacing the metal with a noble metal; or (4) by impregnating the base metal with hydrogen and then replacing electrolytically the hydrogen on the base metal with a noble metal, in a modification of this method the base metal is replaced by niobium oxide.