Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이종목 | * |
dc.contributor.author | 이영미 | * |
dc.contributor.author | 김명화 | * |
dc.date.accessioned | 2020-03-23T16:30:16Z | - |
dc.date.available | 2020-03-23T16:30:16Z | - |
dc.date.issued | 2020 | * |
dc.identifier.issn | 0925-4005 | * |
dc.identifier.other | OAK-26590 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/253612 | - |
dc.description.abstract | This paper reports the facile formation of the alloy nanofibers of highly immiscible Au and Ir with diverse composition ratios (denoted as TH2_AuxIr1-x, x= 0.05, 0.10 or 0.33, relative molar content of Au precursor) and the application for direct glucose oxidation. First, the composite nanofibers consisting of Ir/IrO2 fibrous main frames decorated with Au nanoparticles (denoted as Pre_AuxIr1-xOy ) were synthesized via electrospinning and calcination. Then, these composites were annealed under H-2 gas flowing and successfully transformed to AuIr alloy nanofibers along with IrO2 reduction to Ir metal in the Ir/IrO2 fibrous frames. Thermal H-2-treatments with varying temperatures and duration times confirmed that Au-Ir alloy production required an unusually low temperature >= 90 degrees C at which Au and Ir were completely alloyed within 1 min. This study suggests that the Au-Ir alloying and IrO2 reduction occur simultaneously and promote each other. TH2_Au0.33Ir0.67, with similar to 50.4 % Au atomic %, was found to still have segregated Au phase, indicating the limited solubility (molar ratio of Au/Ir < 1). Alloyed TH2_Au0.10Ir0.90 exhibited high electroactivity for glucose oxidation: a surprisingly low onset potential ( < < - 0.4 V vs SCE) and greatly enhanced oxidation current levels compared with Pre_Au0.10Ir0.90Oy and pure Au nanoparticles. The high activity of TH2_Au0.10Ir0.90 go was attributed to the higher surface area of Au and more favorable formation of catalytically active OHads in the Au-Ir alloy. Current study presents that Au-Ir alloys can be formed under moderate condition via thermal H-2-treatment and possess a feasibility for nonenzymatic glucose oxidation. | * |
dc.language | English | * |
dc.publisher | ELSEVIER SCIENCE SA | * |
dc.subject | Iridium | * |
dc.subject | Gold | * |
dc.subject | Nanofibrous alloy | * |
dc.subject | Electrospinning | * |
dc.subject | Glucose oxidation | * |
dc.subject | Electrocatalysis | * |
dc.title | Au-Ir alloy nanofibers synthesized from Au-Ir/IrO2 composites via thermal hydrogen treatment: Application for glucose oxidation | * |
dc.type | Article | * |
dc.relation.volume | 310 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | SENSORS AND ACTUATORS B-CHEMICAL | * |
dc.identifier.doi | 10.1016/j.snb.2020.127822 | * |
dc.identifier.wosid | WOS:000519306300012 | * |
dc.identifier.scopusid | 2-s2.0-85079172333 | * |
dc.author.google | Yu, Areum | * |
dc.author.google | Moon, Sinyoung | * |
dc.author.google | Kwon, Taehui | * |
dc.author.google | Cho, Yun-Bin | * |
dc.author.google | Kim, Myung Hwa | * |
dc.author.google | Lee, Chongmok | * |
dc.author.google | Lee, Youngmi | * |
dc.contributor.scopusid | 이종목(55812178500) | * |
dc.contributor.scopusid | 이영미(35237907700) | * |
dc.contributor.scopusid | 김명화(57191596821) | * |
dc.date.modifydate | 20240422130854 | * |