摘要 : Abstract A series of porous N‐doped carbon electrocatalysts decorated with Cu and Fe3C, namely Cu/Fe3C/N?C‐x‐T (T=temperature, and x=Cu/Fe molar ratio), have been prepared for oxygen reduction by pyrolysis of trimetallic Cu/Fe/... 展开 Abstract A series of porous N‐doped carbon electrocatalysts decorated with Cu and Fe3C, namely Cu/Fe3C/N?C‐x‐T (T=temperature, and x=Cu/Fe molar ratio), have been prepared for oxygen reduction by pyrolysis of trimetallic Cu/Fe/Zn MOF (MOF=Metal‐Organic Framework) precursors with variable Cu/Fe molar ratio. It reveals that the Cu/Fe molar ratio has a great impact not only on the morphologies of Cu/Fe3C/N?C‐x‐T electrocatalysts but also on the catalytic performance toward oxygen reduction. In 0.1?M KOH solution, the optimal Cu/Fe3C/N?C‐1‐1000 electrocatalyst can compete with the Pt/C benchmark, showing Eonset (onset potential) of 0.95?V (vs. RHE) and E1/2 (half‐wave potential) of 0.85?V (vs. RHE) (RHE=Reversible Hydrogen Electrode). Zinc‐air battery with Cu/Fe3C/N?C‐1‐1000 as the cathode also delivers a maximal power density of 90?mW.cm?2, and demonstrates a little decay in potential after running for 40?hrs at 20?mA.cm?2. 收起