Patent ID: 8912114
Filing Date: 2014-12-16
Classification: H01M,Y02E

Abstract:
1. A method of making a nanoparticulate platinum alloy catalyst, the method comprising the steps of: (a) providing a salt or complex of platinum and a salt or complex of a transition metal in an aqueous solution; (b) injecting an aliquot of the aqueous solution into a nonpolar solvent to form an emulsion; (c) adding a reducing agent to the emulsion, whereby the platinum and transition metal become reduced and form a colloidal sol comprising nanoparticles of platinum alloy; (d) adding a surfactant to the colloidal sol after step (c); whereby the surfactant encapsulates the nanoparticles; (e) adding particulate carbon to the colloidal sol after step (d); and (f) adding a polar solvent miscible with the nonpolar solvent, whereby the platinum alloy nanoparticles adhere to the carbon particles to form a nanoparticulate platinum alloy catalyst.