Nailing the oxygen excess ratio isn’t just a nice-to-have: it’s the secret sauce for top-notch fuel cell efficiency and long-lasting durability. Introducing the Second-Order ADRCMeet the new kid on the block: a research dream team tackling PEMFC control challenges with a second-order Active Disturbance Rejection Control (2-ADRC). These improvements aren’t just numbers—they point to a future where PEMFC control feels lightning-fast whenever you hit the accelerator. This isn’t just a tweak—it’s a leap toward super-dynamic, ultra-robust PEMFC control. All in all, 2-ADRC is raising the bar in Active Disturbance Rejection Control.