50× mass activity
A phase-boundary-identified solid solution with minimal Ir content, achieving ultrahigh OER mass activity in acid and greatly enhanced Ir utilization.
Hongyan, Hu · Shilong, Liu · Hongfei, Sun · Wenli, Sun · Wei, Lingzhi · Chen, Xiaowei · Chen, Qianwang · Lin, Yichao · Tian, Ziqi · Su, Jianwei
Small 2025
Mass activity of 1135 A g⁻¹ Ir at 300 mV overpotential, ≈50× commercial IrO₂
Stable at 200 mA cm⁻² for over 120 h in PEMWE operation