Abstract
AbstractHigh performance of Fe‐N−C electrocatalysts with excellent activity and durability are the most promising alternatives to replace the costly Pt‐based catalysts to catalyze the sluggish oxygen reduction reaction (ORR) kinetics at present. Herein, a zinc gluconate engaged strategy was reported to prepare iron‐inside carbon nanotube Fe‐N−C composites (Fe‐CNTs/NC), in which the zinc could be volatile in the process of high‐temperature pyrolysis and promoted in situ grown the iron‐inside carbon nanotubes in porous carbon matrix. The Fe‐CNTs/NC catalyst, benefiting from the hierarchical porous structure and abundant active sites, exhibits superior electrocatalytic performance (half‐wave potential of 0.838 V) and stability (9.31 % decay after a 20 000 s continuous test) in alkaline media compared to commercial Pt/C (half‐wave potential of 0.824 V and 13.15 % of stability decay rate under the same conditions). This study provides novel insights into the construction of carbon materials with dispersed active sites and hierarchically porous structure for electrocatalytic applications.
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