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| Type |
Poster Presentation |
| Area |
전기화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
ELEC.P-508 |
| Subject |
Ultrasound-Assisted Syntheses of Extremely Small and Amorphous NiFe-based Nanoparticles as Superior Electrocatalysts for Oxygen Evolution Reaction |
| Authors |
박아현, 박현욱, 정종운, 권영욱*
성균관대학교 화학과, Korea
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| Abstract |
In this study, we present the one-pot syntheses of NiFe-based nanomaterials and their electrochemical performance for oxygen evolution reaction (OER) in alkaline media. By using a simple sonochemical route, we achieved the preparation of amorphous and composition tunable NiFe-based nanomaterials which are received lots of attentions as desirable and novel electrocatalyst with low overpotential for OER. Through the structural characterization, we found that these materials have extremely small particle size and homogeneous elemental compositions. Electrochemical analysis also showed that the OER activity of samples exhibit the volcano-type trend according to adjusting of Fe content. Among them, Ni70Fe30 sample showed overpotential of 292 mV at 10 mA cm-2geo and Tafel slop of 30.4 mV dec-1, which outperform that of IrOx/C (326 mV, 41.7 mV dec-1). Chronopotentiometry at 10 mA cm-2geo for 2 h of samples for durability test reveals that Ni70Fe30 sample maintains the steady-state potential compared with that of IrOx/C, meaning an excellent durability of our samples. Based on our results, we demonstrated that sonochemical syntheses could be novel approach to prepare superior and durable OER electrocatalyst with for water electrolysis and metal-air battery. |
| E-mail |
pah802@naver.com |
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119th General Meeting of the KCS