| 학회 |
한국화학공학회 |
| 학술대회 |
2017년 봄 (04/26 ~ 04/28, ICC 제주) |
| 권호 |
23권 1호, p.882 |
| 발표분야 |
재료 |
| 제목 |
Two-dimensional TiO2 nanosheets doped with transition metal (Fe, Co, Ni) as a highly active catalysts for oxygen evolution reaction in alkaline electrolyte |
| 초록 |
Two-dimensional (2D) TiO2 nanosheets doped with Fe/Co/Ni are prepared by exfoliation of acid exchanged layered potassium titanate using tetrabutylammonium hydroxide (TBAOH) as intercalating/delaminating reagent. The nanosheets are mixed with Vulcan XC carbon and tested for oxygen evolution reaction (OER) activity in alkaline condition (0.1 M KOH) using rotating disc electrode (RDE) in a three-electrode setup. Among the catalysts tested Ni-TiO2 show lower overpotential (measured at 10 mA cm-2), when compared to the Fe- or Co- doped TiO2 nanosheet catalysts. Furthermore, co-doping of Fe in Ni-TiO2 shows a 10-fold enhancement in current density at ~300 mV overpotential. The X-ray photoelectron spectroscopy (XPS) results for Ni 2p transition in Ni-Fe-TiO2 show a minor shift in the peak position towards lower binding energy with respect to the Ni 2p peak in Ni-TiO2. The enhancement in OER activity of Fe co-doped Ni-TiO2 catalyst is attributed to electronic effect of Fe incorporation and due to the formation of oxygenated species. |
| 저자 |
Rahul Ramesh1, 이진우2
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| 소속 |
1POSTECH, 2POSTECH 화학공학과 |
| 키워드 |
화공소재 전반 |
| E-Mail |
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| 원문파일 |
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