Efficient Hydrogen Evolution by Mechanically Strained MoS2 Nanosheets

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• 作者：Ji Hoon Lee ; Woo Soon Jang ; Sun Woong Han ; Hong Koo Baik
• 刊名：Langmuir
• 出版年：2014
• 出版时间：August 19, 2014
• 年：2014
• 卷：30
• 期：32
• 页码：9866-9873
• 全文大小：491K
• ISSN：1520-5827

文摘

We demonstrated correlations between mechanically bent tensile-strain-induced two-dimensional MoS₂ nanosheets (NSs) and their electrochemical activities toward the hydrogen evolution reaction (HER). The tensile-strain-induced MoS₂ NSs showed significantly steeper polarization curves and lower Tafel slopes than the strain-free ones, which is consistent with the simple d-band model. Furthermore, the mechanical strain increased the electrochemical activities of all the NSs toward the HER except those loaded with high MoS₂ mass. Mechanically bending MoS₂ NSs to induce tensile strain enables the production of powerful, efficient electrocatalysis systems for evolving hydrogen.