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The great interest in fuel cells inspires a substantial amount of research on nonprecious metal catalysts as alternatives to Pt‐based oxygen reduction reaction (ORR) electrocatalysts. In this work, bimodal template‐based synthesis strategies are proposed for the scalable preparation of hierarchically porous M–N–C (M = Fe or Co) single‐atom electrocatalysts featured with active and robust MN₂ active moieties. Multiscale tuning of M–N–C catalysts regarding increasing the number of active sites and boosting the intrinsic activity of each active site is realized simultaneously at a single‐atom scale. In addition to the antipoisoning power and high affinity for O₂, the optimized Fe–N–C catalysts with FeN₂ active site presents a superior electrocatalytic activity for ORR with a half‐wave potential of 0.927 V (vs reversible hydrogen electrode (RHE)) in an alkaline medium, which is 49 and 55 mV higher than those of the Co–N …