|
|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 19일 (금요일) 11:00~12:30 |
| Code |
MAT.P-442 |
| Subject |
Two Dimensional MoS2/Fe-Phthalocyanine Hybrid Nanosheets as Excellent Bifunctional Electrocatalysts for Hydrogen Evolution and Oxygen Reduction Reactions |
| Authors |
Ik Seon Kwon, In Hye Kwak1, Jisun Yoo, Kim Doyeon, Jaemin Seo, Jeunghee Park*
Department of Materials Chemistry, Korea University, Korea
1Micro Device Engineering / Microdevices, Korea University, Korea
|
| Abstract |
Two-dimensional layered MoS2 has recently been considered as an excellent catalyst for water-splitting hydrogen evolution reaction (HER). Herein, we report that two dimensional MoS2 and Fe-phthalocyanine hybrid nanostructures exhibit excellent bifunctional catalytic activity toward the HER and oxygen reduction reactions (ORR). The catalytic HER is characterized by a Tafel slope of 32 mV dec-1 and 10 mA cm-2 at an overpotential of 0.12 V. The number of electrons involved in the ORR was 4. The remarkable bifunctional performance would be ascribed to a synergic effect of electron-rich metallic 1T’ phase MoS2 and the active Fe-N4 sites toward ORR. Spin-polarized density functional theory calculations on reaction pathway of HER suggests that the basal S atoms just above the Fe are active sites and the catalytic activity is determined by the activation barrier of Heyrovsky step. |
| E-mail |
bbuli12@korea.ac.kr |
|
123rd General Meeting of the KCS