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  Synergistically creating sulfur vacancies in semimetal-supported amorphous MoS2 for efficient hydrogen evolution

Li, G., Fu, C., Wu, J., Rao, J., Liou, S.-C., Xu, X., et al. (2019). Synergistically creating sulfur vacancies in semimetal-supported amorphous MoS2 for efficient hydrogen evolution. Applied Catalysis B, 254, 1-6. doi:10.1016/j.apcatb.2019.04.080.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-BD33-F Version Permalink: http://hdl.handle.net/21.11116/0000-0003-BD35-D
Genre: Journal Article

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 Creators:
Li, Guowei1, Author              
Fu, Chenguang1, Author              
Wu, Jiquan2, Author
Rao, Jiancun2, Author
Liou, Sz-Chian2, Author
Xu, Xijin2, Author
Shao, Baiqi2, Author
Liu, Kai2, Author
Liu, Enke2, Author
Kumar, Nitesh1, Author              
Liu, Xianjie2, Author
Fahlman, Mats2, Author
Gooth, Johannes3, Author              
Auffermann, Gudrun4, Author              
Sun, Yan1, Author              
Felser, Claudia5, Author              
Zhang, Baomin2, Author
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Nanostructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_3018212              
4Gudrun Auffermann, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863432              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: Electrocatalyst, MoS 2, Semimetal, Sulfur vacancies
 Abstract: The presence of elemental vacancies in materials are inevitable according to statistical thermodynamics, which will decide the chemical and physical properties of the investigated system. However, the controlled manipulation of vacancies for specific applications is a challenge. Here we report a facile method for creating large concentrations of S vacancies in the inert basal plane of MoS 2 supported on semimetal CoMoP 2 . With a small applied potential, S atoms can be removed in the form of H 2 S due to the optimized free energy of formation. The existence of vacancies favors electron injection from the electrode to the active site by decreasing the contact resistance. As a consequence, the catalytic current is increased by 221% with the vacancy-rich MoS 2 as electrocatalyst for hydrogen evolution reaction (HER). A small overpotential of 75 mV is needed to deliver a current density of 10 mA cm −2 , which is considered among the best values achieved for MoS 2 . It is envisaged that this work may provide a new strategy for utilizing the semimetal phase for structuring MoS 2 into a multi-functional material. © 2019 Elsevier B.V.

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Language(s): eng - English
 Dates: 2019-04-272019-04-27
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.apcatb.2019.04.080
 Degree: -

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Title: Applied Catalysis B
  Other : Appl. Catal. B
Source Genre: Journal
 Creator(s):
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 254 Sequence Number: - Start / End Page: 1 - 6 Identifier: ISSN: 0926-3373
CoNE: https://pure.mpg.de/cone/journals/resource/954928540173_1