Sheng, X., Bian, F., Li, Y., Li, Y., Zhao, Z., Li, L., Li, C., Shi, H., Shao, P., Yang, L., Luo, X., Shi, W. (2026). Spin‐State Switching Modulates Lewis Acidity in Ferrihydrite for Enhanced Phosphate Capture. Advanced Materials. https://doi.org/10.1002/adma.202519105