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

Author

Listed:
  • Charlie Tsai

    (SUNCAT Center for Interface Science and Catalysis, Stanford University
    SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory)

  • Hong Li

    (Stanford University
    School of Mechanical and Aerospace Engineering, Nanyang Technological University)

  • Sangwook Park

    (Stanford University)

  • Joonsuk Park

    (Stanford University)

  • Hyun Soo Han

    (Stanford University)

  • Jens K. Nørskov

    (SUNCAT Center for Interface Science and Catalysis, Stanford University
    SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory)

  • Xiaolin Zheng

    (Stanford University)

  • Frank Abild-Pedersen

    (SUNCAT Center for Interface Science and Catalysis, Stanford University
    SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory)

Abstract

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.

Suggested Citation

  • Charlie Tsai & Hong Li & Sangwook Park & Joonsuk Park & Hyun Soo Han & Jens K. Nørskov & Xiaolin Zheng & Frank Abild-Pedersen, 2017. "Electrochemical generation of sulfur vacancies in the basal plane of MoS2 for hydrogen evolution," Nature Communications, Nature, vol. 8(1), pages 1-8, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15113
    DOI: 10.1038/ncomms15113
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    Cited by:

    1. Daniel Escalera-López & Christian Iffelsberger & Matej Zlatar & Katarina Novčić & Nik Maselj & Chuyen Pham & Primož Jovanovič & Nejc Hodnik & Simon Thiele & Martin Pumera & Serhiy Cherevko, 2024. "Allotrope-dependent activity-stability relationships of molybdenum sulfide hydrogen evolution electrocatalysts," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    2. Mohammad Qorbani & Amr Sabbah & Ying-Ren Lai & Septia Kholimatussadiah & Shaham Quadir & Chih-Yang Huang & Indrajit Shown & Yi-Fan Huang & Michitoshi Hayashi & Kuei-Hsien Chen & Li-Chyong Chen, 2022. "Atomistic insights into highly active reconstructed edges of monolayer 2H-WSe2 photocatalyst," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    3. Yanghang Pan & Xinzhu Wang & Weiyang Zhang & Lingyu Tang & Zhangyan Mu & Cheng Liu & Bailin Tian & Muchun Fei & Yamei Sun & Huanhuan Su & Libo Gao & Peng Wang & Xiangfeng Duan & Jing Ma & Mengning Din, 2022. "Boosting the performance of single-atom catalysts via external electric field polarization," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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