Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이종목 | * |
dc.contributor.author | 이영미 | * |
dc.contributor.author | 김명화 | * |
dc.date.accessioned | 2019-02-15T16:30:09Z | - |
dc.date.available | 2019-02-15T16:30:09Z | - |
dc.date.issued | 2019 | * |
dc.identifier.issn | 1944-8244 | * |
dc.identifier.other | OAK-24314 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/248391 | - |
dc.description.abstract | Nanocomposites of gold (Au) and iridium (Ir) oxide with various compositions (denoted as AuxIr1-xOy, x = 0.05, 0.10, or 0.33, Au precursor molar ratio to Ir precursor) were synthesized via electrospinning and subsequent calcination method with two different solvent composition ratios of ethanol to N,N-dimethylformamide (DMF) in the electrospinning solution (ethanol/DMF = 70:30 or 50:50% v/v). Simple single-step electrospinning successfully fabricated a hierarchical nanostructure having Au nanoparticles formed on fibrous main frames of Ir/IrO2. Different solvent composition in the electrospinning solution induced the formation of main frames with distinct nanostructures; nanoribbons (AuxIr1-xOy-70) with ethanol/DMF = 70:30; and nanofibers (AuxIr1-xOy-50) with ethanol/DMF = 50:50. The pure Ir or Au counterparts (IrOy and Au) were also prepared by the same synthetic procedure as AuxIr1-xOy. Oxygen evolution reaction (OER) activities of as-synthesized AuxIr1-xOy were investigated in 0.5 M H2SO4 and compared to those of IrOy, Au, and commercial iridium (Ir/C, 20% Ir loading on Vulcan carbon). Among them, Au0.10Ir0.90Oy-50 exhibited the best OER activity, even better than previously reported catalysts containing both Ir and Au. The high OER activity of Au0.10Ir0.90Oy-50 was mainly attributed to the fiber frame structure and the optimal interfacial areas between Au and Ir/IrO2, which are electrophilic OER active sites. The stability of Au0.10Ir0.90Oy-50 was also evaluated to be much higher than that of Ir/C during OER. The current study suggests that the presence of Au on the Ir/IrO2 surface improves the OER activity of Ir/IrO2. © 2018 American Chemical Society. | * |
dc.language | English | * |
dc.publisher | American Chemical Society | * |
dc.subject | electrocatalysis | * |
dc.subject | electrospinning | * |
dc.subject | fibrous nanocomposite | * |
dc.subject | gold | * |
dc.subject | iridium oxide | * |
dc.subject | oxygen evolution reaction | * |
dc.title | Single-Step Electrospun Ir/IrO2 Nanofibrous Structures Decorated with Au Nanoparticles for Highly Catalytic Oxygen Evolution Reaction | * |
dc.type | Article | * |
dc.relation.issue | 2 | * |
dc.relation.volume | 11 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 1979 | * |
dc.relation.lastpage | 1987 | * |
dc.relation.journaltitle | ACS Applied Materials and Interfaces | * |
dc.identifier.doi | 10.1021/acsami.8b14563 | * |
dc.identifier.wosid | WOS:000456351100027 | * |
dc.identifier.scopusid | 2-s2.0-85059817273 | * |
dc.author.google | Moon S. | * |
dc.author.google | Cho Y.-B. | * |
dc.author.google | Yu A. | * |
dc.author.google | Kim M.H. | * |
dc.author.google | Lee C. | * |
dc.author.google | Lee Y. | * |
dc.contributor.scopusid | 이종목(55812178500) | * |
dc.contributor.scopusid | 이영미(35237907700) | * |
dc.contributor.scopusid | 김명화(57191596821) | * |
dc.date.modifydate | 20240422130854 | * |