Ionic strength induced electrodeposition of two-dimensional layered MoS2 nanosheets

Pankaj Kumar Rastogi, Sujoy Sarkar, Daniel Mandler*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


A new redox-free electrochemical approach for driving the deposition of two-dimensional (2D) layered MoS2 nanosheets is described. First, poly(acylic acid) (PAA) functionalized layered MoS2 nanosheets (PAA-MoS2) is prepared to form a stable aqueous PAA-MoS2 dispersion, which is subsequently used for the electrochemical deposition. In contrast to previous electrodeposition methods of MoS2, which involve the redox of molecular precursors of Mo and S, herein we introduce an electrochemical approach for the deposition of 2D layered MoS2 nanosheets directly from their nanometric building blocks, namely from their aqueous dispersion. This “nano to nano” approach is based on altering the ionic strength at the vicinity of the electrode surface by applying a potential. Specifically, the electrogeneration of Cu2+ ions, cause the PAA-MoS2 nanosheets in the dispersion to aggregate and deposit on the copper electrode. Scanning electron microscopy, X-ray diffraction, Raman and X-ray photoelectron spectroscopy analysis show clearly that the deposited layered MoS2 maintains its original structure. Furthermore, the electrodeposited PAA-MoS2 nanosheets on copper show excellent catalytic activity for the hydrogen evolution reaction with low overpotential. Hence, we believe that these findings could lead to a generic approach for the formation of thin films or patterns of 2D nanomaterials.

Original languageAmerican English
Pages (from-to)44-53
Number of pages10
JournalApplied Materials Today
StatePublished - 1 Sep 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd


  • 2D materials
  • Electrodeposition
  • HER
  • Ionic strength
  • MoS
  • Transition metal dichalcogenides


Dive into the research topics of 'Ionic strength induced electrodeposition of two-dimensional layered MoS2 nanosheets'. Together they form a unique fingerprint.

Cite this