Developing durable catalysts for the acidic oxygen evolution reaction is crucial for proton exchange membrane water electrolyzers. Here, the authors report incorporating high-entropy atoms (Co, Ni, Cu, Mn, Sm) into RuO2 via annealing, achieving stable operation at 1 A cm⁻² and 50 °C for 1500 h.
- Fangren Qian
- Dengfeng Cao
- Li Song
