Kim, In Gyeom Nah, In Wook Park, Sehkyu 2024-01-19T22:03:08Z 2024-01-19T22:03:08Z 2021-09-03 2018-08-01 2196-0216 https://pubs.kist.re.kr/handle/201004/121055 Although the development of a highly active and cost-effective electrocatalyst for the oxygen reduction reaction (ORR) is necessary, it is a challenging issue for commercially viable energy conversion applications such as fuel cells or metal-air batteries. In this study, we synthesize nitrogen-doped, carbon-supported CoO catalysts (denoted as CoO/NCs) with high stability and activity. The CoO/NC is prepared by one-pot spray pyrolysis, which is simple and has an easily scalable synthetic route. In an effort to find a better catalyst composition for ORR activity, several catalysts are synthesized by controlling the concentrations of the solutions that contain carbon, urea as the nitrogen source, and a cobalt precursor. The catalysts are then characterized using various methods to comprehensively study their properties coupled with ORR kinetics and stability. The CoO/NC2 catalyst shows higher catalytic activity towards ORR than the other in-house prepared catalysts. It is comparable to commercial Pt/C and has very high stability for 80h in an alkaline medium. Systematic analyses clarify that the superior electrocatalytic performance of CoO/NC2 stems mainly from its enhanced electron density and pathway by heteroatom doping and its modified carbon nature during spray pyrolysis. English WILEY-V C H VERLAG GMBH REDUCED GRAPHENE OXIDE EFFICIENT BIFUNCTIONAL ELECTROCATALYST MEMBRANE FUEL-CELLS EVOLUTION REACTION REDUCTION/EVOLUTION REACTIONS CO3O4 NANOPARTICLES NITROGEN NANOTUBES METAL NANOCOMPOSITES Enhanced Oxygen Reduction Stability and Activity by Co and N (or O) Interaction in CoO on N-Doped Carbon Prepared through Spray Pyrolysis Article 10.1002/celc.201800396 1 CHEMELECTROCHEM, v.5, no.15, pp.2089 - 2097 CHEMELECTROCHEM 5 15 2089 2097 scie scopus 000440546600007 2-s2.0-85047500490 Electrochemistry Electrochemistry Article REDUCED GRAPHENE OXIDE EFFICIENT BIFUNCTIONAL ELECTROCATALYST MEMBRANE FUEL-CELLS EVOLUTION REACTION REDUCTION/EVOLUTION REACTIONS CO3O4 NANOPARTICLES NITROGEN NANOTUBES METAL NANOCOMPOSITES cobalt (II) oxide N-doped carbon fuel cells spray pyrolysis oxygen reduction reaction