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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-498 |
| Subject |
Binary metal nanoparticles embedded in carbon nanofiber for efficient electrochemical water splitting |
| Authors |
Dongsub Lee, Jooyoung Lee, Byungkwon Lim*
Advanced Materials Science and Engineering, Sungkyunkwan University, Korea
|
| Abstract |
Developing low-cost and efficient electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reactions (OER) are one of the major challenges for electrochemical water splitting. Herein, we report achieves a series of metal-based nanoparticles (Co–CeO2, Ni2Fe) embedded in carbon nanofibers (CNFs) by using electrospinning technique and heat treatment process, which are found efficient catalysts for electrolytic water splitting. The Co-CeO2 embedded in CNFs (Co-CeO2@CNFs) and Ni2Fe embedded in CNFs (Ni2Fe@CNF) produce low overpotentials of 92 and 239 mV at a current density of 10 mA cm−2 as catalysts for HER and OER, respectively. The as-prepared hybrid materials demonstrate outstanding catalytic activities as non-noble metal electrodes rendered by the synergistic effect of bimetal elements and the improved electrical conductivity. With the use of these Co-CeO2@CNFs and Ni2Fe@CNF catalyst, an alkaline water electrolyzer in a two-electrode configuration achieved 10 mA cm-2 only at a cell voltage of 1.55 V with iR compensation in 1 M KOH. Our results suggest that the metal-based nanoparticles (Co–CeO2, Ni2Fe) embedded in CNFscould serve as a low-cost, highly active catalyst for electrochemical water splitting. |
| E-mail |
leedongsub92@gmail.com |
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122nd General Meeting of the KCS