PLATINUM CORE-SHELL CATALYST MANUFACTURING METHOD, AND FUEL CELL USING CATALYST

摘要

PROBLEM TO BE SOLVED: To provide a method in which a platinum core-shell catalyst, which is suitably used as a catalyst for oxygen reduction reactions in a fuel cell, can be produced in large quantities through a simple manufacturing process.SOLUTION: In the method, a gold core particle is immersed in a solution containing a bivalent or tetravalent platinum ion in the absence of a reducing agent to deposit platinum directly onto the gold core particle. It is preferable that the gold core particle is deposited on the surface of a carrier and the solution is an aqueous solution containing the platinum ion of 0.1-100 mM concentration.