Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105625
Title: Electrochemical exfoliation of MoS2 crystal for hydrogen electrogeneration
Authors: Ambrosi, Adriano
Pumera, Martin
Keywords: Exfoliation
Molybdenum Sulfide
Science::Chemistry
Issue Date: 2018
Source: Ambrosi, A., & Pumera, M. (2018). Electrochemical exfoliation of MoS2 crystal for hydrogen electrogeneration. Chemistry - A European Journal, 24(69), 18551-18555. doi:10.1002/chem.201804821
Series/Report no.: Chemistry - A European Journal
Abstract: Transition metal dichalcogenides (TMDs) have recently emerged within the group of 2D materials due to their electrical, catalytic and optical properties significantly enhanced and useful when down-sized to single layer. In particular, MoS2 has attracted much attention due to its semiconducting nature with a useful band gap when present as single layer, the enhanced photoluminescence, but also importantly the excellent catalytic properties towards the electrochemical hydrogen evolution. We present here the preparation of thin layers MoS2 nanosheets with enhanced catalytic properties towards the hydrogen evolution reaction by means of an easy and fast electrochemical top-down exfoliation procedure in aqueous solution from a naturally occurring MoS2 crystal. After structural and chemical characterization with STEM, AFM, XPS and Raman spectroscopy we performed electrochemical investigations to test catalytic properties in acidic solution for the electrogeneration of hydrogen and compare it to MoS2 nanosheets obtained through the widely employed chemical Li intercalation/exfoliation. Electrochemically exfoliated MoS2 shows lower Tafel slope than its counterpart obtained with chemical exfoliation.
URI: https://hdl.handle.net/10356/105625
http://hdl.handle.net/10220/50248
ISSN: 0947-6539
DOI: 10.1002/chem.201804821
Rights: This is the peer reviewed version of the following article: Ambrosi, A., & Pumera, M. (2018). Electrochemical exfoliation of MoS2 crystal for hydrogen electrogeneration. Chemistry - A European Journal, 24(69), 18551-18555., which has been published in final form at http://dx.doi.org/10.1002/chem.201804821. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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