Abstract
AbstractNanostructured nitrogen‐doped carbon materials are considered as an appealing material to replace precious‐metal Pt‐based catalysts in fuel cells due to a high oxygen reduction reaction (ORR) activity and outstanding stability. In the present work, we developed an ion‐induced method for the fabrication of hierarchical porous nitrogen‐doped carbon materials (HPNC) using Cd‐organic complexes as sacrificial templates and precursors. During pyrolysis, a hierarchical porous structure with a high specific surface area was formed through the combination of a metal‐free ion as structure‐directing agent and the evaporation property of Cd. Benefiting from this unique structure, the resulting HPNC exhibited comparable ORR performance with commercial Pt/C, including positive onset potential of 0.96 V vs. RHE (reversible hydrogen electrode), positive half‐wave potential of 0.86 V vs. RHE, good methanol tolerance and stability. On this basis, the assembled Zn‐air battery showed high open circuit potential, power density and excellent stability.
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