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Enhancing Catalytic Activity of MoS2 Basal Plane S-Vacancy by Co Cluster Addition

Journal Article · · ACS Energy Letters
The basal plane of molybdenum disulfide (MoS2) was recently activated for hydrogen evolution reaction (HER) by creating sulfur (S) vacancies (MoS2-x). However, the HER activity of those S-vacancies depends on the concentration of S-vacancies, imposing a dilemma for either improving activity per site or increasing overall active site density. In this work, we use density functional theory (DFT) calculations and experiments to show that the HER activities of MoS2-x are greatly enhanced by adding cobalt (Co) clusters on the basal plane. Furthermore, our DFT results show that the highest HER activity is achieved when the Co clusters are anchored on the S-vacancies with the interface of Co-Mo as the preferred active site. Our experiments confirm that the addition of Co enhances the activity per unit active site and increases the electrochemical active surface area. These results demonstrate the basal plane activity of MoS2-x can be enhanced by decorating S-vacancies with transition-metal clusters.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1656475
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 11 Vol. 3; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Activation of MoS 2 Basal Planes for Hydrogen Evolution by Zinc journal January 2019
Activation of MoS 2 Basal Planes for Hydrogen Evolution by Zinc journal January 2019
Tree-Like NiS2/MoS2-RGO Nanocomposites as pH Universal Electrocatalysts for Hydrogen Evolution Reaction journal February 2019
Defect engineering of molybdenum disulfide through ion irradiation to boost hydrogen evolution reaction performance journal April 2019
The preparation of Ni/Mo-based ternary electrocatalysts by the self-propagating initiated nitridation reaction and their application for efficient hydrogen production journal January 2019
Active site manipulation in MoS 2 cluster electrocatalysts by transition metal doping journal January 2020
Ru x Se@MoS 2 hybrid as a highly efficient electrocatalyst toward hydrogen evolution reaction journal January 2019
NO reduction over an Al-embedded MoS 2 monolayer: a first-principles study journal January 2019
Superior electrocatalytic hydrogen evolution at engineered non-stoichiometric two-dimensional transition metal dichalcogenide edges journal January 2019

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