Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이종목 | * |
dc.contributor.author | 이영미 | * |
dc.contributor.author | 김명화 | * |
dc.date.accessioned | 2017-12-27T16:31:01Z | - |
dc.date.available | 2017-12-27T16:31:01Z | - |
dc.date.issued | 2017 | * |
dc.identifier.issn | 1944-8244 | * |
dc.identifier.other | OAK-21445 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/239405 | - |
dc.description.abstract | Here, we report the unique transformation of one-dimensional tubular mixed oxide nanocomposites of iridium (Ir) and cobalt (Co) denoted as IrxCo1-xOy, where x is the relative Ir atomic content to the overall metal content. The formation of a variety of IrxCo1-xOy (0 ≤ x ≤ 1) crystalline tubular nanocomposites was readily achieved by electrospinning and subsequent calcination process. Structural characterization clearly confirmed that IrxCo1-xOy polycrystalline nanocomposites had a tubular morphology consisting of Ir/IrO2 and Co3O4, where Ir, Co, and O were homogeneously distributed throughout the entire nanostructures. The facile formation of IrxCo1-xOy nanotubes was mainly ascribed to the inclination of Co3O4 to form the nanotubes during the calcination process, which could play a critical role in providing a template of tubular structure and facilitating the formation of IrO2 by being incorporated with Ir precursors. Furthermore, the electroactivity of obtained IrxCo1-xOy nanotubes was characterized for oxygen evolution reaction (OER) with rotating disk electrode voltammetry in 1 M NaOH aqueous solution. Among diverse IrxCo1-xOy, Ir0.46Co0.54Oy nanotubes showed the best OER activity (the least-positive onset potential, greatest current density, and low Tafel slope), which was even better than that of commercial Ir/C. The Ir0.46Co0.54Oy nanotubes also exhibited a high stability in alkaline electrolyte. Expensive Ir mixed with cheap Co at an optimum ratio showed a greater OER catalytic activity than pure Ir oxide, one of the most efficient OER catalysts. © 2017 American Chemical Society. | * |
dc.language | English | * |
dc.publisher | American Chemical Society | * |
dc.subject | cobalt | * |
dc.subject | electrocatalyst | * |
dc.subject | electrospinning | * |
dc.subject | iridium | * |
dc.subject | mixed metal oxide nanotubes | * |
dc.subject | oxygen evolution reaction | * |
dc.title | Nanotubular Iridium-Cobalt Mixed Oxide Crystalline Architectures Inherited from Cobalt Oxide for Highly Efficient Oxygen Evolution Reaction Catalysis | * |
dc.type | Article | * |
dc.relation.issue | 40 | * |
dc.relation.volume | 9 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 35057 | * |
dc.relation.lastpage | 35066 | * |
dc.relation.journaltitle | ACS Applied Materials and Interfaces | * |
dc.identifier.doi | 10.1021/acsami.7b12247 | * |
dc.identifier.wosid | WOS:000413131500052 | * |
dc.identifier.scopusid | 2-s2.0-85031104048 | * |
dc.author.google | Yu A. | * |
dc.author.google | Lee C. | * |
dc.author.google | Kim M.H. | * |
dc.author.google | Lee Y. | * |
dc.contributor.scopusid | 이종목(55812178500) | * |
dc.contributor.scopusid | 이영미(35237907700) | * |
dc.contributor.scopusid | 김명화(57191596821) | * |
dc.date.modifydate | 20240422130854 | * |