Preparing an alloy catalyst using conductive polymer coating

摘要

Techniques herein prepare an alloy catalyst using a protective conductive polymer coating. More particularly, an alloy catalyst is prepared by: preparing a platinum catalyst supported on carbon; coating the surface of the platinum catalyst with a conductive polymer; supporting a transition metal salt on the coated catalyst; and heat treating the catalyst on which the transition metal salt is supported. Also, an alloy catalyst may be prepared by: preparing a platinum-transition metal catalyst supported on carbon; coating the surface of the platinum-transition metal catalyst with a conductive polymer; and heat treating the coated catalyst. Accordingly an alloy catalyst with superior dispersity can be prepared by increasing the degree of alloying of the catalyst through heat treatment while preventing the increase of catalyst particle size through carbonization of the conductive polymer. The prepared catalyst may be useful, for example, for a fuel cell electrode.

主权项

1. A method for preparing an alloy catalyst comprising:
preparing a platinum catalyst supported on carbon by reducing a platinum ion which is mixed with the carbon that is one or more selected from a group consisting of carbon nanotube, carbon nanofiber, carbon nanocoil and carbon nanocage, wherein the carbon is doped by 1-pyrenecarboxylic acid; coating the surface of the platinum catalyst with a conductive polymer; supporting a transition metal salt on the coated catalyst; and heat treating the catalyst on which the transition metal salt is supported, wherein the platinum catalyst is supported on carbon by chemical reduction using a reducing agent, and the heat treatment is performed at a temperature of 700° C.-1000° C. under argon and hydrogen atmosphere, and wherein the conductive polymer is carbonized and removed by the heat treating, and carbonization and removal of the conductive of polymer during the heat treatment lead to formation of face-centered cubic alloy of the platinum catalyst and the transition metal.