Sultan, Siraj Tiwari, Jitendra N. Jang, Jue-Hyuk Harzandi, Ahmad M. Salehnia, Foad Yoo, Sung Jong Kim, Kwang S. 2024-01-19T22:00:45Z 2024-01-19T22:00:45Z 2021-09-03 2018-09-05 1614-6832 https://pubs.kist.re.kr/handle/201004/120928 Nonprecious metals are promising catalysts to avoid the sluggish oxygen reduction reaction (ORR) in next-generation regenerative fuel cells or metalair batteries. Therefore, development of nonprecious metal catalysts for ORR is highly desirable. Herein, precise tuning of the atomic ratio of Fe and Co encapsulated in melamine-derived nitrogen-rich graphitic tube (NGT) is reported. The Co1.08Fe3.34 hybrid with metal. nitrogen bonds (1: Co1.08Fe3.34@ NGT) shows remarkable ORR catalytic activities (80 mV higher in onset potential and 50 mV higher in half-wave potential than those of state-ofthe- art commercial Pt/C catalysts), high current density, and stability. In acidic solution, 1 also shows compatible performance to commercial Pt/C in terms of ORR activity, current density, stability, and methanol tolerance. The high ORR activity is ascribed to the co-existence of Fe-N, Co-N, and sufficient metallic FeCo alloys which favor faster electron movement and better adsorption of oxygen molecules on the catalyst surface. In the alkaline anion exchange membrane fuel cell setup, this cell delivers the power density of 117 mW cm(-2), demonstrating its potential use for energy conversion and storage applications. English WILEY-V C H VERLAG GMBH NANOTUBE-GRAFTED NITROGEN MEMBRANE FUEL-CELLS CARBON NANOTUBES EVOLUTION REACTION AIR BATTERIES ELECTROCATALYSTS GRAPHENE NANOPARTICLES CATALYSTS IRON Highly Efficient Oxygen Reduction Reaction Activity of Graphitic Tube Encapsulating Nitrided CoxFe gamma Alloy Article 10.1002/aenm.201801002 1 ADVANCED ENERGY MATERIALS, v.8, no.25 ADVANCED ENERGY MATERIALS 8 25 scie scopus 000443674100007 2-s2.0-85052810409 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article NANOTUBE-GRAFTED NITROGEN MEMBRANE FUEL-CELLS CARBON NANOTUBES EVOLUTION REACTION AIR BATTERIES ELECTROCATALYSTS GRAPHENE NANOPARTICLES CATALYSTS IRON alkaline fuel cells electrocatalysts graphitic tubes nitrided CoxFe gamma alloys oxygen reduction reaction