Dual-Functional\nElectrocatalyst Derived from Iron-Porphyrin-Encapsulated Metal–Organic\nFrameworks

Abstract

Active,\nstable electrocatalysts based on non-precious metals for the oxygen\nreduction reaction (ORR) and hydrogen evolution reaction (HER) are\ncritical for the development of cost-effective, efficient renewable\nenergy technologies. Here, Fe/Fe₃C-embedded nitrogen-doped\ncarbon was fabricated via pyrolysis of iron-porphyrin-encapsulated\nmesoporous metal–organic frameworks [PCN-333 (Fe), where “PCN”\nstands for “porous coordination network”] at 700 °C.\nThe various characterization techniques confirmed that Fe- and Fe₃C-containing Fe–N–C material (FeP-P333-700)\nwas successfully prepared by pyrolysis of porphyrin-encapsulated PCN-333\n(Fe). FeP-P333-700 exhibited superior electrocatalytic performance\nfor the ORR and HER owing to the synergistic effect of Fe/Fe₃C and Fe–N–C active sites.