1. Realization of Wafer‐Scale 1T‐MoS 2 Film for Efficient Hydrogen Evolution Reaction
- Author
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Hee Joon Jung, Ji-Yun Moon, Dongmok Whang, Kyu-Young Park, Hyunho Seok, Vinayak P. Dravid, Jae-Hyun Lee, Jonghwan Park, Taesung Kim, Hyeong-U Kim, Byeong-Seon An, and Mansu Kim
- Subjects
Materials science ,General Chemical Engineering ,Sulfidation ,02 engineering and technology ,Chemical vapor deposition ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,Electrochemistry ,Trigonal prismatic molecular geometry ,01 natural sciences ,0104 chemical sciences ,Catalysis ,chemistry.chemical_compound ,General Energy ,Chemical engineering ,chemistry ,Environmental Chemistry ,General Materials Science ,0210 nano-technology ,Molybdenum disulfide ,Hydrogen production - Abstract
The octahedral structure of 2D molybdenum disulfide (1T-MoS2 ) has attracted attention as a high-efficiency and low-cost electrocatalyst for hydrogen production. However, the large-scale synthesis of 1T-MoS2 films has not been realized because of higher formation energy compared to that of the trigonal prismatic phase (2H)-MoS2 . In this study, a uniform wafer-scale synthesis of the metastable 1T-MoS2 film is performed by sulfidation of the Mo metal layer using a plasma-enhanced chemical vapor deposition (PE-CVD) system. Thus, plasma-containing highly reactive ions and radicals of the sulfurization precursor enable the synthesis of 1T-MoS2 at 150 °C. Electrochemical analysis of 1T-MoS2 shows enhanced catalytic activity for the hydrogen evolution reaction (HER) compared to that of previously reported MoS2 electrocatalysts 1T-MoS2 does not transform into stable 2H-MoS2 even after 1000 cycles of HER. The proposed low-temperature synthesis approach may offer a promising solution for the facile production of various metastable-phase 2D materials.
- Published
- 2021