| 摘要 |
PROBLEM TO BE SOLVED: To provide acetylene black having a high specific surface area and high dispersibility.SOLUTION: Acetylene black has a specific surface area of 500-1,100 m/g and includes 10 ppm or less of agglomerated particles of 20 μm or more. The acetylene black preferably has a dispersion degree by fineness gauge of 40 μm or less, and further preferably has an overall pore volume of 0.8 ml/g or more. A catalyst for polymer fuel cell includes platinum particles and/or platinum alloy particles supported on the acetylene black. |
