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Title: Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction
Authors: Voiry, D.
Salehi, M.
Silva, R.
Fujita, T.
Chen, M.
Asefa, T.
Shenoy, V.B.
Eda, G. 
Chhowalla, M.
Keywords: chemical exfoliation
hydrogen evolution reaction
Layered materials
layered transition metal dichalcogenide
Issue Date: 11-Dec-2013
Citation: Voiry, D., Salehi, M., Silva, R., Fujita, T., Chen, M., Asefa, T., Shenoy, V.B., Eda, G., Chhowalla, M. (2013-12-11). Conducting MoS2 nanosheets as catalysts for hydrogen evolution reaction. Nano Letters 13 (12) : 6222-6227. ScholarBank@NUS Repository.
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. © 2013 American Chemical Society.
Source Title: Nano Letters
ISSN: 15306984
DOI: 10.1021/nl403661s
Appears in Collections:Staff Publications

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