High Electrochemical Selectivity of Edge versus Terrace Sites in Two-Dimensional Layered MoS2 Materials

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• 作者：Haotian Wang ; Qianfan Zhang ; Hongbin Yao ; Zheng Liang ; Hyun-Wook Lee ; Po-Chun Hsu ; Guangyuan Zheng ; Yi Cui
• 刊名：Nano Letters
• 出版年：2014
• 出版时间：December 10, 2014
• 年：2014
• 卷：14
• 期：12
• 页码：7138-7144
• 全文大小：478K
• ISSN：1530-6992

文摘

Exploring the chemical reactivity of different atomic sites on crystal surface and controlling their exposures are important for catalysis and renewable energy storage. Here, we use two-dimensional layered molybdenum disulfide (MoS₂) to demonstrate the electrochemical selectivity of edge versus terrace sites for Li鈥揝 batteries and hydrogen evolution reaction (HER). Lithium sulfide (Li₂S) nanoparticles decorates along the edges of the MoS₂ nanosheet versus terrace, confirming the strong binding energies between Li₂S and the edge sites and guiding the improved electrode design for Li鈥揝 batteries. We also provided clear comparison of HER activity between edge and terrace sites of MoS₂ beyond the previous theoretical prediction and experimental proof.

Keywords:

Electrochemical selectivity; Two-dimensional materials; MoS₂; Li鈭扴 batteries; Hydrogen evolution reaction