Patent ID: 6506228
Filing Date: 2003-01-14
Classification: B01J,H01M,Y02E

Abstract:
A method of preparing a platinum alloy electrode catalyst for a direct methanol fuel cell, comprising the steps of:dissolving platinum chloride in an organic water-incompatible solvent to form a platinum chloride solution; dissolving a non-aqueous second metal chloride in said organic water-incompatible solvent to form a second metal chloride solution; mixing said platinum chloride solution and said second metal chloride solution to form a third solution; reducing said third solution by adding a boron lithium hydride solution to said third solution to form platinum alloy particles having an average particle size of less than 2 nm; separating said platinum alloy particles from said reduced third solution; and, freeze drying said platinum alloy particles by dispersing said platinum alloy particles in a mixed solvent of benzene and distilled water.