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Electrochemical generation of sulfur vacancies in the basal plane of MoS2 for hydrogen evolution

Cited 562 time in Web of Science Cited 553 time in Scopus
Authors

Tsai, Charlie; Li, Hong; Park, Sangwook; Park, Joonsuk; Han, Hyun Soo; Nørskov, Jens K.; Zheng, Xiaolin; Abild-Pedersen, Frank

Issue Date
2017-04
Publisher
Nature Publishing Group
Citation
Nature Communications, Vol.8, p. 15113
Abstract
© The Author(s) 2017.Recently, sulfur (S)-vacancies created on the basal plane of 2H-molybdenum disulfide (MoS2) using argon plasma exposure exhibited higher intrinsic activity for the electrochemical hydrogen evolution reaction than the edge sites and metallic 1T-phase of MoS2 catalysts. However, a more industrially viable alternative to the argon plasma desulfurization process is needed. In this work, we introduce a scalable route towards generating S-vacancies on the MoS2 basal plane using electrochemical desulfurization. Even though sulfur atoms on the basal plane are known to be stable and inert, we find that they can be electrochemically reduced under accessible applied potentials. This can be done on various 2H-MoS2 nanostructures. By changing the applied desulfurization potential, the extent of desulfurization and the resulting activity can be varied. The resulting active sites are stable under extended desulfurization durations and show consistent HER activity.
ISSN
2041-1723
URI
https://hdl.handle.net/10371/202176
DOI
https://doi.org/10.1038/ncomms15113
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  • College of Engineering
  • Department of Mechanical Engineering
Research Area Clean Hydrogen Production and Storage, Greenhouse Gas Reduction and Carbon Utilization, Water & Air Purification, 오염수 및 대기 정화 기술, 온실 기체 절감 및 탄소 자원화, 친환경 수소 생산 및 저장

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