Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이종목 | * |
dc.contributor.author | 이영미 | * |
dc.contributor.author | 김명화 | * |
dc.contributor.author | 김수진 | * |
dc.date.accessioned | 2019-06-04T16:30:07Z | - |
dc.date.available | 2019-06-04T16:30:07Z | - |
dc.date.issued | 2019 | * |
dc.identifier.issn | 2168-0485 | * |
dc.identifier.other | OAK-24841 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/249913 | - |
dc.description.abstract | Hydrogen evolution reaction (HER) is of importance in energy conversion processes. This paper reports the facile synthesis of iridium/iridium oxide nanofibers (Ir/IrO(2)NFs) with diverse Ir and IrO2 relative composition ratios and their electrocatalytic HER activities. Highly porous Ir/IrO(2)NFs are simply synthesized via electrospinning and the following calcination at various temperatures (300-900 degrees C). Different calcination temperature alters the actual composition of Ir/IrO(2)NFs: The higher the temperature, the greater IrO2 content exists. The HER activity of Ir/IrO(2)NFs is examined in 1 M H2SO4. Ir/IrO2NF calcined at 300 degrees C exhibits the best HER activity in terms of the onset potential, overpotential generating 50 mA cm(-2), turnover frequency, Tafel slope along with the decent stability for 5 h; the HER performance of this material even exceeds that of platinum, a benchmark HER catalyst. As the IrO2 content in Ir/IrO(2)NFs increases with a higher calcination temperature, the HER activity decreases. Ir/IrO2NF calcined at 900 degrees C consists of only IrO2 and presents the worst activity. DFT calculations show that hydrogen atom adsorption on metallic Ir (not IrO2) resembles that on Pt: similar adsorption energy and adsorbate-substrate distance. Both the experimental and theoretical results clearly demonstrate that metallic Ir rather than IrO2 is a good HER catalytic platform. | * |
dc.language | English | * |
dc.publisher | AMER CHEMICAL SOC | * |
dc.subject | Hydrogen evolution reaction | * |
dc.subject | Nanofibers | * |
dc.subject | Iridium metal | * |
dc.subject | Iridium oxide | * |
dc.subject | Electrospinning | * |
dc.subject | DFT calculation | * |
dc.title | Comparative Study on Hydrogen Evolution Reaction Activity of Electrospun Nanofibers with Diverse Metallic Ir and IrO2 Composition Ratios | * |
dc.type | Article | * |
dc.relation.issue | 9 | * |
dc.relation.volume | 7 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 8613 | * |
dc.relation.lastpage | 8620 | * |
dc.relation.journaltitle | ACS SUSTAINABLE CHEMISTRY & ENGINEERING | * |
dc.identifier.doi | 10.1021/acssuschemeng.9b00402 | * |
dc.identifier.wosid | WOS:000467351200064 | * |
dc.identifier.scopusid | 2-s2.0-85065391765 | * |
dc.author.google | Kim, Su-jin | * |
dc.author.google | Jung, Hyeseung | * |
dc.author.google | Lee, Chongmok | * |
dc.author.google | Kim, Myung Hwa | * |
dc.author.google | Lee, Youngmi | * |
dc.contributor.scopusid | 이종목(55812178500) | * |
dc.contributor.scopusid | 이영미(35237907700) | * |
dc.contributor.scopusid | 김명화(57191596821) | * |
dc.contributor.scopusid | 김수진(55862532700;55461431200) | * |
dc.date.modifydate | 20240130103418 | * |