Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction

Damien Voiry, Maryam Salehi, Rafael Silva, Takeshi Fujita, Mingwei Chen, Teddy Asefa, Vivek B. Shenoy, Goki Eda, Manish Chhowalla

Research output: Contribution to journalArticle

1050 Citations (Scopus)

Abstract

We report chemically exfoliated MoS2 nanosheets with a very high concentration of metallic 1T phase using a solvent free intercalation method. After removing the excess of negative charges from the surface of the nanosheets, highly conducting 1T phase MoS2 nanosheets exhibit excellent catalytic activity toward the evolution of hydrogen with a notably low Tafel slope of 40 mV/dec. By partially oxidizing MoS2, we found that the activity of 2H MoS2 is significantly reduced after oxidation, consistent with edge oxidation. On the other hand, 1T MoS2 remains unaffected after oxidation, suggesting that edges of the nanosheets are not the main active sites. The importance of electrical conductivity of the two phases on the hydrogen evolution reaction activity has been further confirmed by using carbon nanotubes to increase the conductivity of 2H MoS2.

Original languageEnglish
Pages (from-to)6222-6227
Number of pages6
JournalNano Letters
Volume13
Issue number12
DOIs
Publication statusPublished - Dec 11 2013

Fingerprint

Nanosheets
Hydrogen
catalysts
conduction
oxidation
Catalysts
hydrogen
Oxidation
intercalation
Carbon Nanotubes
catalytic activity
Intercalation
carbon nanotubes
slopes
Catalyst activity
Carbon nanotubes
conductivity
electrical resistivity

Keywords

  • chemical exfoliation
  • hydrogen evolution reaction
  • Layered materials
  • layered transition metal dichalcogenide
  • MoS

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction. / Voiry, Damien; Salehi, Maryam; Silva, Rafael; Fujita, Takeshi; Chen, Mingwei; Asefa, Teddy; Shenoy, Vivek B.; Eda, Goki; Chhowalla, Manish.

In: Nano Letters, Vol. 13, No. 12, 11.12.2013, p. 6222-6227.

Research output: Contribution to journalArticle

Voiry, D, Salehi, M, Silva, R, Fujita, T, Chen, M, Asefa, T, Shenoy, VB, Eda, G & Chhowalla, M 2013, 'Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction', Nano Letters, vol. 13, no. 12, pp. 6222-6227. https://doi.org/10.1021/nl403661s
Voiry D, Salehi M, Silva R, Fujita T, Chen M, Asefa T et al. Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction. Nano Letters. 2013 Dec 11;13(12):6222-6227. https://doi.org/10.1021/nl403661s
Voiry, Damien ; Salehi, Maryam ; Silva, Rafael ; Fujita, Takeshi ; Chen, Mingwei ; Asefa, Teddy ; Shenoy, Vivek B. ; Eda, Goki ; Chhowalla, Manish. / Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction. In: Nano Letters. 2013 ; Vol. 13, No. 12. pp. 6222-6227.
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