Instantaneous Thermal Energy for Swift Synthesis of Single-Atom Catalysts for Unparalleled Performance in Metal-Air Batteries and Fuel Cells.

Autor: Jang I; Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea.; Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea., Lee S; Department of Environment and Energy Engineering, Sungshin Women's University, Seoul, 01133, Republic of Korea., Kim DG; School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University, Jeonju, 54896, Republic of Korea., Paidi VK; European Synchrotron Radiation Facility, Grenoble, 38043 Cedex 9, France., Lee S; School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University, Jeonju, 54896, Republic of Korea., Kim ND; Functional Composite Materials Research Center, Korea Institute of Science and Technology (KIST), Jeollabuk-do, 55324, Republic of Korea., Jung JY; Fuel Cell Research and Demonstration Center, Hydrogen Energy Institute, Korea Institute of Energy Research (KIER), Joellabuk-do, 56332, Republic of Korea., Lee KS; Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea., Lim HK; Division of Chemical and Bioengineering, Kangwon National University, Chuncheon, 24341, Republic of Korea., Kim P; School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University, Jeonju, 54896, Republic of Korea., Yoo SJ; Hydrogen·Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea.; Division of Energy & Environmental Technology, KIST school, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Aug; Vol. 36 (32), pp. e2403273. Date of Electronic Publication: 2024 May 28.
DOI: 10.1002/adma.202403273
Abstrakt: 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 FeN 4 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.
(© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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