Cited by 829Electrocatalysts for Energy Conversion2D Materials and ApplicationsCatalysis and Hydrodesulfurization Studies

All The Catalytic Active Sites of MoS 2 for Hydrogen Evolution

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Li, Guoqing, Zhang, Du, Qiao, Qiao, Yu, Yifei, Peterson, David, Zafar, Abdullah, Kumar, Raj, Curtarolo, Stefano +5 more·2016·Journal of the American Chemical Society

Abstract

MoS 2 presents a promising low-cost catalyst for the hydrogen evolution reaction (HER), but the understanding about its active sites has remained limited. Here we present an unambiguous study of the catalytic activities of all possible reaction sites of MoS 2, including edge sites, sulfur vacancies, and grain boundaries. We demonstrate that, in addition to the well-known catalytically active edge sites, sulfur vacancies provide another major active site for the HER, while the catalytic activity of grain boundaries is much weaker. The intrinsic turnover frequencies (Tafel slopes) of the edge sites, sulfur vacancies, and grain boundaries are estimated to be 7.5 s –1 (65–75 mV/dec), 3.2 s –1 (65–85 mV/dec), and 0.1 s –1 (120–160 mV/dec), respectively. We also demonstrate that the catalytic activity of sulfur vacancies strongly depends on the density of the vacancies and the local crystalline structure in proximity to the vacancies. Unlike edge sites, whose catalytic activity linearly depends on the length, sulfur vacancies show optimal catalytic activities when the vacancy density is in the range of 7–10%, and the number of sulfur vacancies in high crystalline quality MoS 2 is higher than that in low crystalline quality MoS 2, which may be related with the proximity of different local crystalline structures to the vacancies.

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  1. [10]10. Kong, D. et al. Synthesis of MoS2 and MoSe2 Films with Vertically Aligned Layers. Nano Letters 13, 1341-1347 (2013).
  2. [15]15. Voiry, D. et al. Conducting MoS2 Nanosheets as Catalysts for Hydrogen Evolution Reaction. Nano Letters 13, 6222-6227 (2013).
  3. [18]18. Yu, Y. et al. Layer-Dependent Electrocatalysis of MoS2 for Hydrogen Evolution. Nano Letters 14, 553-558 (2014).
  4. [28]28. Chen, Z.B. et al. Core-shell MoO3-MoS2 Nanowires for Hydrogen Evolution: A Functional Design for Electrocatalytic Materials. Nano Letters 11, 4168-4175 (2011).
  5. [32]32. Bockris, J.O. Pleskov's review of surface electrochemistry: A molecular level approach -Reply. Russ J Electrochem+ 31, 1211-1211 (1995).
  6. [36]36. Hinnemann, B. et al. Biornimetic hydrogen evolution: MoS2 nanoparticles as catalyst for hydrogen evolution. Journal of the American Chemical Society 127, 5308-5309 (2005).

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Authors
Li, G., Zhang, D., Qiao, Q., Yu, Y., Peterson, D., Zafar, A., Kumar, R., Curtarolo, S., Hunte, F., Shannon, S., Zhu, Y., Yang, W., & Cao, L.
Affiliations
  • North Carolina State University (US)
  • Duke University (US)
  • Brookhaven National Laboratory (US)
Corresponding author
Cao, Linyou
Venue
Journal of the American Chemical Society
Published
2016-12-15
Volume
138
Issue
51
Pages
16632-16638
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2558659093
Cited by
829
References
41
Citations by year
2026: 48 · 2025: 68 · 2024: 76 · 2023: 79 · 2022: 95 · 2021: 98 · 2020: 107 · 2019: 123 · 2018: 85 · 2017: 49
FWCI
23.21
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Basic Energy Sciences (DE-SC0012575, DE-SC0012704)
  • U.S. Department of Energy
  • Division of Physics (PHY1338917)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
  • Physical Sciences › Engineering › Mechanical Engineering › Catalysis and Hydrodesulfurization Studies
Keywords
MoS2, hydrogen evolution reaction, catalytic site, sulfur vacancies, edge sites, grain boundaries, vacancy concentration, Tafel slope, crystal quality, electrocatalysis

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