Controllable Growth and Transfer of Monolayer MoS2 on Au Foils and Its Potential Application in Hydrogen Evolution Reaction

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• 作者：Jianping Shi ; Donglin Ma ; Gao-Feng Han ; Yu Zhang ; Qingqing Ji ; Teng Gao ; Jingyu Sun ; Xiuju Song ; Cong Li ; Yanshuo Zhang ; Xing-You Lang ; Yanfeng Zhang ; Zhongfan Liu
• 刊名：ACS Nano
• 出版年：2014
• 出版时间：October 28, 2014
• 年：2014
• 卷：8
• 期：10
• 页码：10196-10204
• 全文大小：737K
• ISSN：1936-086X

文摘

Controllable synthesis of monolayer MoS₂ is essential for fulfilling the application potentials of MoS₂ in optoelectronics and valleytronics, etc. Herein, we report the scalable growth of high quality, domain size tunable (edge length from 鈭?00 nm to 50 渭m), strictly monolayer MoS₂ flakes or even complete films on commercially available Au foils, via low pressure chemical vapor deposition method. The as-grown MoS₂ samples can be transferred onto arbitrary substrates like SiO₂/Si and quartz with a perfect preservation of the crystal quality, thus probably facilitating its versatile applications. Of particular interest, the nanosized triangular MoS₂ flakes on Au foils are proven to be excellent electrocatalysts for hydrogen evolution reaction, featured by a rather low Tafel slope (61 mV/decade) and a relative high exchange current density (38.1 渭A/cm²). The excellent electron coupling between MoS₂ and Au foils is considered to account for the extraordinary hydrogen evolution reaction activity. Our work reports the synthesis of monolayer MoS₂ when introducing metal foils as substrates, and presents sound proof that monolayer MoS₂ assembled on a well selected electrode can manifest a hydrogen evolution reaction property comparable with that of nanoparticles or few-layer MoS₂ electrocatalysts.

Keywords:

molybdenum disulfide; chemical vapor deposition; thickness control; hydrogen evolution reaction; Au foil