Publication detail

Electrochemical Exfoliation of MoS2 Crystal for Hydrogen Electrogeneration

AMBROSI, A. PUMERA, M.

Original Title

Electrochemical Exfoliation of MoS2 Crystal for Hydrogen Electrogeneration

Type

journal article in Web of Science

Language

English

Original 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 electrochemical investigations were performed 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.

Keywords

electrochemistry; exfoliation; hydrogen-evolution reaction; layered compound; molybdenum sulfide

Authors

AMBROSI, A.; PUMERA, M.

Released

10. 12. 2018

ISBN

0947-6539

Periodical

CHEMISTRY-A EUROPEAN JOURNAL

Year of study

24

Number

69

State

Federal Republic of Germany

Pages from

18551

Pages to

18555

Pages count

5

URL

https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201804821

BibTex

@article{BUT157072,
  author="Adriano {Ambrosi} and Martin {Pumera}",
  title="Electrochemical Exfoliation of MoS2 Crystal for Hydrogen Electrogeneration",
  journal="CHEMISTRY-A EUROPEAN JOURNAL",
  year="2018",
  volume="24",
  number="69",
  pages="18551--18555",
  doi="10.1002/chem.201804821",
  issn="0947-6539",
  url="https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201804821"
}