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Robust and efficient catalysts for the oxygen reduction reaction (ORR) are required for the development of various energy storage and conversion devices. In this study, a durable and high-performance Fe3C@graphene ORR catalyst has been developed by the carbonization of urea- and agar-modified Fe2O3 nanorods. The influence of the carbonization temperature and annealing time on the activity and stability of the resulting Fe/ C catalyst was studied in detail. The Fe/C catalyst synthesized at a temperature of 700°C (holding time: 60 min) showed better ORR activity and improved stability compared to a commercial Pt/C catalyst. The improved ORR catalytic activity of the catalyst is due to its high Fe3C content and its good durability results from the unique microstructure of the Fe3C@graphene hybrid. [ABSTRACT FROM AUTHOR]

Robust and efficient catalysts for the oxygen reduction reaction (ORR) are required for the development of various energy storage and conversion devices. In this study, a durable and high-performance Fe 3 C@graphene ORR catalyst has been developed by the carbonization of urea- and agar-modified Fe 2 O 3 nanorods. The influence of the carbonization temperature and annealing time on the activity and stability of the resulting Fe/C catalyst was studied in detail. The Fe/C catalyst synthesized at a temperature of 700 °C (holding time: 60 min) showed better ORR activity and improved stability compared to a commercial Pt/C catalyst. The improved ORR catalytic activity of the catalyst is due to its high Fe 3 C content and its good durability results from the unique microstructure of the Fe 3 C@graphene hybrid., (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)