Keywords: Bifunctional Active Sites; Oxygen Reduction; S-Block Metal K; S-Orbital Electron Structure; Single AtomElectrocatalysis. An s‐block potassium single‐atom electrocatalyst with K‐N4 configuration derived from K /polydopamine for efficient oxygen reduction is reported in the Research Article by Zhonglong Zhao, Jiangwei Zhang, Qin Wang, Limin Wu et al. (e202312409)...By Niankun Guo; Hui Xue; Rui Ren; Jing Sun; Tianshan Song; Hongliang Dong; Zhonglong Zhao; Jiangwei Zhang; Qin Wang and Limin WuReported by Author; Author; Author; Author; Author; Author; Author; Author; Author; Author