Electrochemical and optical studies of facile synthesized molybdenum disulphide (MoS2) nano structures

Navpreet Kaur, Rameez Ahmad Mir, O. P. Pandey

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The global energy demand requires high energy conversion and storage devices. In order to enhance the utility of these devices, highly efficient, stable and cost effective catalyst and electrode materials are required. In the present study, the nano-size single phase molybdenum disulphide (MoS2) has been synthesized at 700 °C via reduction-sulphurization method in a specially designed autoclave. The UV–Visible and photoluminescence results are in accordance with the Raman spectroscopy studies, confirming few layers (5–6 layers) of synthesized MoS2 exhibiting a band gap of 2.29 eV. Based on structural and morphological results, the formation mechanism from MoO3 to MoS2 is proposed. The as-synthesized samples are expected to be promising stable catalyst for hydrogen evolution reaction (HER) through water splitting in both acidic and basic medium. The cyclic voltammetry (CV) test for 1000 cycles in basic medium shows enhanced stability of pure phase MoS2. The electrochemical double layer capacitance (EDLC) of 2.8 mFcm−2 reveals that the synthesized material is a promising candidate for double layer capacitors and super-capacitors with high capacitance retention of 1000 CV cycles at fix scan rate.

Original languageEnglish
Pages (from-to)119-131
Number of pages13
JournalJournal of Alloys and Compounds
Volume782
DOIs
StatePublished - 25 Apr 2019
Externally publishedYes

Keywords

  • Capcitance
  • Electrocatlysis
  • Layered structure
  • Molybdenum sulphide
  • Reduction-sulphurization

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