Investigation of the durability of Fe/N-doped mesoporous carbon nanostructure as a non-precious metal catalyst for oxygen reduction reaction in acid medium

초록

The relatively sluggish oxygen reduction reaction (ORR) and high overpotential at the cathode, compared to anode, increases the loading amount of Pt cathode catalysts. Thus, non-precious metal (NPM) catalysts such as nitrogen-doped carbon nanostructures and macrocyclic structure of transition metal and nitrogen have been studied as an alternative to conventional Pt catalyst. Previously, we reported the synthesis of a Fe/N-doped mesoporous carbon nanostructure (denoted as Fe/N–C) by a template method with 5,10,15,20-tetrakis(4-methoxyphenyl)-21H, 23H-porphyrin iron(III) chloride (Fe-TMPP) as a doping and carbon source. The Fe/N-doped carbon nanostructure as a NPM cathode catalyst showed the improved ORR activity owing to electrocatalytic active sites such as pyridinic and pyrrolic N states, and Fe–N

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