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Dual-Functional Electrocatalyst Derived from Iron-Porphyrin-Encapsulated Metal–Organic Frameworks

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posted on 02.08.2017, 00:00 authored by Jungwon Park, Hyunjoon Lee, Young Eun Bae, Kyoung Chul Park, Hoon Ji, Nak Cheon Jeong, Min Hyung Lee, Oh Joong Kwon, Chang Yeon Lee
Active, stable electrocatalysts based on non-precious metals for the oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) are critical for the development of cost-effective, efficient renewable energy technologies. Here, Fe/Fe3C-embedded nitrogen-doped carbon was fabricated via pyrolysis of iron-porphyrin-encapsulated mesoporous metal–organic frameworks [PCN-333 (Fe), where “PCN” stands for “porous coordination network”] at 700 °C. The various characterization techniques confirmed that Fe- and Fe3C-containing Fe–N–C material (FeP-P333-700) was successfully prepared by pyrolysis of porphyrin-encapsulated PCN-333 (Fe). FeP-P333-700 exhibited superior electrocatalytic performance for the ORR and HER owing to the synergistic effect of Fe/Fe3C and Fe–N–C active sites.

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