固体高分子形燃料電池の高耐久・高性能化に向けたIr-IrO₂/TiO₂粒子の火炎合成と発電性能評価

抄録

This study presents the enhancement of polymer electrolyte fuel cells through a novel catalyst support Ir-IrO₂/TiO₂, synthesized via flame aerosol process for better durability and performance. With a focus on iridium oxide–titanium oxide particles for their superior properties, the flame process enables efficient production with minimal precious metal use. The research evaluates the influence of iridium loading on particle morphology and conductivity, revealing significant improvements. Specifically, 10 wt% IrO₂-loaded particles drastically reduce volume resistivity compared to pure TiO₂, demonstrating enhanced conductivity. Furthermore, 20 wt% Pt-loaded particles show a high electrochemical surface area with evenly distributed Pt nanoparticles. Membrane electrode assembly tests reveal that the Ir-IrO₂/TiO₂-based anode is comparable to conventional carbon-supported Pt’s performance but offers more excellent stability under high voltage testing, highlighting its potential in fuel cell applications.