Nano Letters· 2013Q1
Conducting MoS<sub>2</sub> Nanosheets as Catalysts for Hydrogen Evolution Reaction
- 2,174citations
- Q1SCImago
- 2013year
Short summary
Chemically exfoliated MoS<sub>2</sub> nanosheets with a high concentration of metallic 1T phase show excellent catalytic activity for hydrogen evolution, exhibiting a low Tafel slope of 40 mV/dec.
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Key points
- Developed solvent-free method to produce MoS<sub>2</sub> nanosheets with a high concentration of metallic 1T phase.
- 1T phase MoS<sub>2</sub> nanosheets exhibit excellent catalytic activity for hydrogen evolution reaction.
- Achieved a low Tafel slope of 40 mV/dec, indicating efficient catalysis.
- Electrical conductivity, rather than edge sites, appears to be the key factor for catalytic activity.
AI-generated from the title and abstract; the full text is not read.
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.
The authors' abstract, as published at the source. Nano Letters, 2013 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy