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Hydrogen Evolution Reaction on Hybrid Catalysts of Vertical MoS2 Nanosheets and Hydrogenated Graphene
Abstract
Two-dimensional (2D) molybdenum sulfide (MoS 2 ) is an attractive noble-metal-free electrocatalyst for hydrogen evolution (HER) in acids. Tremendous effort has been made to engineer MoS 2 catalysts with either more active sites or higher conductivity to enhance their HER activity. However, little attention has been paid to synergistically structural and electronic modulations of MoS 2 . Herein, 2D hydrogenated graphene (HG) is introduced into MoS 2 ultrathin nanosheets for the construction of a highly efficient and stable catalyst for HER. Owing to synergistic modulations of both structural and electronic benefits to MoS 2 nanosheets via HG support, such a catalyst has improved conductivity, more accessible catalytic active sites, and moderate hydrogen adsorption energy. On the optimized MoS 2 /HG hybrid catalyst, HER occurs with an overpotential of 124 mV at 10 mA cm –2, a Tafel slope of 41 mV dec –1, and a stable durability for 24 h continuous operation at 30 mA cm –2 without observable fading. The high performance of the optimized MoS 2 /HG hybrid catalyst for HER was interpreted with density functional theory calculations. The simulation results reveal that the introduction of HG modulates the electronic structure of MoS 2 to increase the number of active sites and simultaneously optimizes the hydrogen adsorption energy at S-edge atoms, eventually promoting HER activity. This study thus provides a strategy to design and develop high-performance HER electrocatalysts by employing different 2D materials.
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Cites
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2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis
Fu, Q., Han, J., Wang, X., Xu, P., Yao, T., Zhong, J., Zhong, W., Liu, S., Gao, T., Zhang, Z., et al. (2021) · Advanced Materials · doi:10.1002/adma.201907818 · Cited by 697
Heterostructures Based on 2D Materials: A Versatile Platform for Efficient Catalysis
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Defects Enhance the Electrocatalytic Hydrogen Evolution Properties of MoS2‐based Materials
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Xue, Y., Bai, X., Xu, Y., Yan, Q., Zhu, M., Zhu, K., Ye, K., Yan, J., Cao, D., & Wang, G. (2021) · Composites Part B: Engineering · doi:10.1016/j.compositesb.2021.109229 · Cited by 68
Peng, K., Zhou, J., Gao, H., Wang, J., Wang, H., Su, L., & Wan, P. (2020) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.0c02046 · Cited by 67
Cheng, Y., Yuan, P., Xu, X., Guo, S., Pang, K., Guo, H., Zhang, Z., Wu, X., Zheng, L., & Song, R. (2019) · Nanoscale · doi:10.1039/c9nr07277b · Cited by 48
Peng, K., Wang, Y., Liu, F., Wan, P., Wang, H., Niu, M., Su, L., Zhuang, L., & Qin, Y. (2023) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.3c02802 · Cited by 22
Metadata
- Authors
- Han, X., Tong, X., Liu, X., Chen, A., Wen, X., Yang, N., & Guo, X.-Y.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-01-30
- Volume
- 8
- Issue
- 3
- Pages
- 1828-1836
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2783341085
- Cited by
- 224
- References
- 16
- FWCI
- 7.07
- Type
- journal article
- Language
- en
- Open access
- closed
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