Jung, Jae Young Jang, Jue-Hyuk Kim, Jeong-Gil Lee, Kug-Seung Lim, Hyung-Kyu Kim, Pil Chang, Robert P. H. Park, Ji-Woong Yoo, Sung Jong Kim, Nam Dong 2024-01-19T14:02:49Z 2024-01-19T14:02:49Z 2022-01-10 2021-08 2366-9608 https://pubs.kist.re.kr/handle/201004/116620 Despite considerable development in the field of single-atom catalysts (SACs) on carbon-based materials, the reported strategies for synthesizing SACs generally rely on top-down approaches, which hinder achieving both simple and universal synthesis routes that are simultaneously applicable to various metals and nanocarbons. Here, a universal strategy for fabricating nanocarbon based-SACs using a flash bottom-up arc discharge method to mitigate these issues is reported. The ionization of elements and their recombination process during arc discharge allows the simultaneous incorporation of single metal atoms (Mn, Fe, Co, Ni, and Pt) into the crystalline carbon lattice during the formation of carbon nanohorns (CNHs) and N-doped arc graphene. The coordination environment around the Co atoms of Co-1/CNH can be modulated by a mild post-treatment with NH3. As a result, Co-1/CNH exhibits good oxygen reduction reaction activity, showing a 1.92 times higher kinetic current density value than the commercial Pt/C catalyst in alkaline media. In a single cell experiment, Co-1/CNH exhibits the highest maximum power density of 472 mW cm(-2) compared to previously reported nonprecious metal-based SACs. English WILEY-V C H VERLAG GMBH Flash Bottom-Up Arc Synthesis of Nanocarbons as a Universal Route for Fabricating Single-Atom Electrocatalysts Article 10.1002/smtd.202100239 1 SMALL METHODS, v.5, no.8 SMALL METHODS 5 8 N scie scopus 000663156900001 2-s2.0-85108204100 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article OXYGEN REDUCTION REACTION NITROGEN-DOPED GRAPHENE EFFICIENT ELECTROREDUCTION ORGANIC FRAMEWORKS ACTIVE-SITES CARBON CATALYSTS PERFORMANCE EXCHANGE COBALT anion exchange membranes fuel cells flash-bottom-up arc discharge method oxygen reduction reactions single-atom catalysts