| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane-electrode structure for a polymer electrolyte fuel cell, capable of improving power generation characteristics by suppressing an increase with time in a particle size of a catalyst metal.SOLUTION: In the membrane-electrode structure for a polymer electrolyte fuel cell, a solid polymer electrolyte membrane 1 is held by a pair of electrode catalyst layers 2, 2 containing catalyst particles 23. In the catalyst particles 23, a catalyst metal 22 is supported by a particulate proton electrolyte polymer 21. The particulate proton electrolyte polymer 21 has an average particle size of 100 nm or less, or has an ion exchange capacity of 0-0.7 meq/g. |
