| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst for platinum/ruthenium high molecular solid electrolyte fuel cell having superior carbon monoxide catalyst poisoning resistance, while carrying the platinum particles or the ruthenium particles in the close condition without aggregating. SOLUTION: In this catalyst for high molecular solid electrolyte fuel cell carrying platinum and ruthenium, the ratio of the platinum to ruthenium to be carried is set at 2 to 4:8 to 6 (mol ratio). Especially, platinum : ruthenium = 4 : 6 is preferable. When both the noble metal particles are carried in the alloy condition while making them come approach close to each other, carbon monoxide catalyst poisoning resistance of the catalyst is further improved. As a carrier, carbon powder including pores having a diameter at 60 angstroms or less at 20% or more with respect to all the pores and having a specific surface area of 600-1,200 m2/g is used. |
