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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 19일 (금요일) 11:00~12:30 |
| Code |
MAT.P-439 |
| Subject |
Intercalation of Cobaltocene into WS2 Nanosheets for Enhanced Catalytic Hydrogen Evolution Reaction |
| Authors |
In Hye Kwak, Ik Seon Kwon1, Jaemin Seo1, Jisun Yoo1, Kim Doyeon1, Jong Hyun Lee1, Jeunghee Park1,*
Micro Device Engineering / Microdevices, Korea University, Korea
1Department of Materials Chemistry, Korea University, Korea
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| Abstract |
We synthesized cobaltocene (7-20%)-intercalated WS2 nanosheets using a solvothermal process. The intercalation of cobaltocene between the expanded 1T’ phase WS2 layers was confirmed by scanning transmission electron microscopy and electron energy loss spectroscopy. The intercalated complexes exhibit excellent performance for catalytic hydrogen evolution reaction (HER), with Tafel slope of 40 mV dec-1 and 10 mA cm-2 at 0.17 V (vs. RHE). Spin-polarized density functional theory calculations showed that cobaltocene is intercalated in the parallel orientation of fivefold symmetry to WS2 plane, forming the charge-transfer complex. Reaction pathway calculations suggest that the basal S atoms just above the Co are the active sites, and the activation barrier of the Heyrovsky reaction determines the catalytic activity. |
| E-mail |
inhye318@korea.ac.kr |
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123rd General Meeting of the KCS