Engineering Mn atomic sites in multi-dimensional nitrogen-doped carbon for highly efficient oxygen reduction reaction.

Nitrogen-coordinated single-atom manganese in multi-dimensional nitrogen-doped carbon electrocatalysts (Mn-NC) were successfully constructed by combining two-dimensional nanosheets and one-dimensional nanofibers. The Mn-NC exhibited excellent oxygen reduction reaction catalytic activity with a half-wave potential of 0.88 V, which is higher than the 0.85 V of Pt/C.