Layer-Dependent Electrocatalysis of MoS2 for Hydrogen Evolution
Open accessAbstract
The quantitative correlation of the catalytic activity with the microscopic structure of heterogeneous catalysts is a major challenge for the field of catalysis science. It requests synergistic capabilities to tailor the structure with atomic scale precision and to control the catalytic reaction to proceed through well-defined pathways. Here we leverage on the controlled growth of MoS2 atomically thin films to demonstrate that the catalytic activity of MoS2 for the hydrogen evolution reaction decreases by a factor of ∼ 4.47 for the addition of every one more layer. Similar layer dependence is also found in edge-riched MoS2 pyramid platelets. This layer-dependent electrocatalysis can be correlated to the hopping of electrons in the vertical direction of MoS2 layers over an interlayer potential barrier. Our experimental results suggest the potential barrier to be 0.119 V, consistent with theoretical calculations. Different from the conventional wisdom, which states that the number of edge sites is important, our results suggest that increasing the hopping efficiency of electrons in the vertical direction is a key for the development of high-efficiency two-dimensional material catalysts.
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CVD is an ideal method to prepare high-quality, few-defect MoS2 nanosheets with controllable layer numbers on different substrates.
“CVD is an ideal method to prepare high-quality, few-defect MoS 2 nanosheets with controllable layer numbers on different substrates. [ 77-80 ]”
From 2D Transition‐Metal‐Dichalcogenide‐Nanosheet‐Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions (2016) · cites this paper as [78]
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- Authors
- Yu, Y., Huang, S.-Y., Li, Y., Steinmann, S. N., Yang, W., & Cao, L.
- Affiliations
- North Carolina State University (US)
- Duke University (US)
- Corresponding author
- Cao, Linyou
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-01-16
- Volume
- 14
- Issue
- 2
- Pages
- 553-558
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W1981702910
- Cited by
- 740
- References
- 7
- Citations by year
- 2026: 20 · 2025: 30 · 2024: 26 · 2023: 44 · 2022: 45 · 2021: 55 · 2020: 70 · 2019: 84 · 2018: 90 · 2017: 103 · 2016: 82 · 2015: 58 · 2014: 33
- FWCI
- 30.37
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Nano Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- 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, electrocatalysis, two-dimensional materials, electron hopping, edge sites, atomically thin films, structure-activity relationship
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