| 학회 |
한국재료학회 |
| 학술대회 |
2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 |
23권 2호 |
| 발표분야 |
13. 저차원 나노소재의 에너지 및 환경 응용(Low-dimensional Nanomaterials for Energy and Environmental Applications ) |
| 제목 |
Defect-engineered MoS2 thin films for high performance water reduction catalysts |
| 초록 |
We successfully synthesized transferrable and transparent anion-engineered molybdenum disulfide thin-film catalysts through a facile thermolysis method by using [(NH4)2MoS4] solution and powder precursors with various sulphur/phosphorus weight ratios. The structure of synthesized sulphur-doped molybdenum phosphide (S:MoP) thin film changed from a two-dimensional van der Waals structure to a three-dimensional hexagonal structure by introduction of phosphorus atoms which substitute the sulphur in the MoS2 thin film. The S:MoP thin film catalyst, which consists of cheap and earth abundant elements, could exhibit the lowest onset potential and the highest photocurrent density for planar p-type Si photocathodes. The density functional theory calculations indicate that the surface of S:MoP thin films absorb hydrogen better than that of MoS2 thin films. The structurally engineered thin film catalyst facilitates the easy transfer of photogenerated electrons from the p-Si light absorber to the electrolyte. Anion-engineering of the MoS2 thin film catalyst would be an efficient way to improve the catalytic activity for photoelectrochemical water splitting. |
| 저자 |
장호원 |
| 소속 |
서울대 |
| 키워드 |
Transition metal disulfide; sulfur doped molybdenum phosphide; hydrogen evolution reaction; water splitting
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| E-Mail |
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