Ou‐Yang, X., Wu, J., Wang, Z., Xiang, Z., Teng, Z., Wang, W., Jiang, X., Xue, W., Zhang, B., Wang, B., Zhang, F., Yan, J. (2026). Cost‐Effective Passive Ammonia Fuel Cells via Synergistic Integration of Optimized Membrane Electrode Assembly and Prototype. Advanced Materials. https://doi.org/10.1002/adma.202510855