Jang, Injoon Lee, Sehyun Kim, Dong-gun Paidi, Vinod K. Lee, Sujin Kim, Nam Dong Jung, Jae Young Lee, Kug-Seung Lim, Hyung-Kyu Kim, Pil Yoo, Sung Jong 2024-06-13T01:30:37Z 2024-06-13T01:30:37Z 2024-06-13 2024-08 0935-9648 https://pubs.kist.re.kr/handle/201004/150055 Based on experimental and computational evidence, phthalocyanine (Pc) compounds in the form of quaternary-bound metal-nitrogen (N) atoms are the most effective catalysts for oxygen reduction reaction (ORR). However, the heat treatment process used in their synthesis may compromise the ideal structure, causing the agglomeration of transition metals. To overcome this issue, a novel method is developed for synthesizing iron (Fe) single-atom catalysts with ideal structures supported by thermally exfoliated graphene oxide (GO). This is achieved through a short heat treatment of only 2.5 min involving FePc and N, N-dimethylformamide in the presence of GO. According to the synthesis mechanism revealed by this study, carbon monoxide acts as a strong linker between the single Fe atoms and graphene. It facilitates the formation of a structure containing oxygen species between FeN4 and graphene, which provides high activity and stability for the ORR. These catalysts possess an enormous number of active sites and exhibit enhanced activity toward the alkaline ORR. They demonstrate excellent performance when applied to real electrochemical devices, such as zinc-air batteries and anion exchange membrane fuel cells. It is expected that the instantaneous heat treatment method developed in this study will aid in the development of high-performing single-atom catalysts. This research presents an innovative method, using a 2.5-min heat treatment, to create highly efficient iron single-atom catalysts supported by graphene oxide. image English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Instantaneous Thermal Energy for Swift Synthesis of Single-Atom Catalysts for Unparalleled Performance in Metal-Air Batteries and Fuel Cells Article 10.1002/adma.202403273 1 Advanced Materials, v.36, no.32 Advanced Materials 36 32 N scie scopus 001232451700001 2-s2.0-85194579098 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article OXYGEN REDUCTION IRON PHTHALOCYANINE GRAPHENE ELECTROCATALYSTS COMPOSITE SITES COORDINATION FILMS atomic dispersion fuel cells instantaneous heat-treatment M-N-C catalyst oxygen reduction reaction Zn-air batteries