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(a) Molecular structure of Ru@C2N, formed by supporting nanosized Ru on a C2N framework. LSV curves and Tafel plots of Co@C2N, Ni@C2N, Pd@C2N, Pt@C2N, and commercial Pt/C in (b,c) 0.5 M H2SO4 solution and (d,e) 1.0 M KOH solution. Panels a–e reproduced with permission from ref (22). Copyright 2017 Nature Publishing Group.
