| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | 6. 인공광합성 기술 개발 동향(Recent research trends in artificial photo-synthesis) |
| 제목 | Can We Activate Catalytically-Inert MoS2 Basal Plane Sites for Efficient Hydrogen Evolution Reaction? |
| 초록 | Fuel cells are a next-generation renewable energy technology that relies on hydrogen as a fuel source. Water, being an everyday chemical, can be used to generate hydrogen fuel at the point of use, making for greater power grid stability and increased convenience for the end user. The search for cheaper, alternative hydrogen generation electrodes is an ongoing effort in the community because the current state-of-the-art platinum-based cells are too expensive to be economically viable on a large scale. In this presentation, we will demonstrate an in situ electrochemical activation process of the MoS2 basal planes by using the atomic layer deposition (ALD) technique to improve the hydrogen evolution reaction (HER) performance of commercial bulk MoS2. The ALD allows coating of a thin layer of titanium dioxide (TiO2) on the edge sites of the MoS2 surface. On basal planes, island formation occurs due to a lack of sites that are reactive to the ALD film precursors. The TiO2 films and islands coated on MoS2 (ALD(TiO2)-MoS2) are then dissolved by an in situ electrochemical activation method, forming localized surface distortions on the MoS2 basal planes. The MoS2 catalysts with activated basal plane surfaces (ALD(Act.)-MoS2) have dramatically enhanced HER kinetics, resulting from more favorable hydrogen-binding. |
| 저자 | 김형주 |
| 소속 | 한국화학(연) |
| 키워드 | MoS2 electrocatalyst; basal plane; atomic layer deposition; hydrogen evolution reaction; electrochemical activation |
