Yu, J., Liu, W., Bai, L., Tian, B., Zhu, Q., Yang, Q., Zhou, L., Wu, H., Wang, Y., Li, B., Jin, X., Kuang, Y., Li, J., Sun, X. (2026). Porosity Engineering Within Ni─N─C Hollow Spheres for Ampere‐Level CO 2 Reduction Electrocatalysis. Advanced Materials. https://doi.org/10.1002/adma.74095