Presentation Information
[10a-PA4-17]Fabrication of Fuel Cell Catalyst Supports Coated with Conductive Nanodiamond and Evaluation of Oxygen Reduction Reaction Activity
〇(D)Akinao Watanabe1, Itsuki Misono1, Hidenobu Shiroishi2, Hiroshi Naragino1, Tsuyoshi Yoshitake1 (1.IGSES, Kyushu Univ., 2.NIT, Tokyo Coll.)
Keywords:
nanodiamond,oxygen reduction,fuel cell
To improve the durability of fuel cell catalyst supports, we fabricated diamond powder coated with a nitrogen-doped conductive nanodiamond layer. This coating decreased the resistivity of the powder, allowing the oxygen reduction reaction to proceed at a more positive potential and thus improving the catalytic activity. Furthermore, the catalyst retained 84% of its initial electrochemically active surface area (ECSA) after durability testing, demonstrating approximately 37% higher durability than conventional Pt-supported carbon black catalysts.