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|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-418 |
| Subject |
Charge-Transfer Intercalated Complex of Metallic MoS2 Nanosheets as Efficient Hydrogen Evolution Reaction Catalysts |
| Authors |
Ik Seon Kwon, InHye Kwak, Gabin Jung, Yeron Lee, jeunghee park1,*
Micro Device Engineering / Microdevices, Korea University, Korea
1Department of Materials Chemistry, Korea University, Korea
|
| Abstract |
The novel properties of two-dimensional materials have motivated extensive studies focused on MoS2, which led to many interesting findings in recent years. Further advances in this area would require the development of effective methods for synthesizing nanostructured MoS2 with a controlled structure. Herein, we report unique MoS2 nanosheets intercalated with dimethyl-p-phenylenediamine (DMPD), synthesized by one-step hydrothermal reaction. The MoS2 nanosheets possess a significantly expanded interlayer spacing. Remarkably, as the concentration of DMPD increases, the MoS2 nanosheets preferentially adopt unique metallic 1T' (distorted 1T) phase. The intercalated MoS2 nanosheets exhibit excellent catalytic performance in the hydrogen evolution reaction. First-principles calculations confirm that the formation of the 1T' phase becomes more favorable with increasing concentrations of DMPD and sulfur vacancies. A significant charge transfer from DMPD to MoS2 stabilizes the 1T' over the 2H phase, resulting in an increased carrier concentration, which leads to the enhanced catalytic performance. The present work illustrates the control of the electronic structures of MoS2 nanosheets by charge-transfer intercalation of electron-donating molecules. |
| E-mail |
bbuli12@korea.ac.kr |
|
121st General Meeting of the KCS