Xie, X., Wen, Q., Wu, Z., Jia, B., Qi, H., Lv, X., Liu, A., Cai, K., Peng, H., Zhang, Z., Lei, Z., Wu, K., Ma, G., Liang, K., Lin, J., Guo, L. (2026). Calcium‐Mediated Fe─N Bond Reinforcement for Ultra‐Stable Oxygen Reduction Reaction. Advanced Materials. https://doi.org/10.1002/adma.73684