Controllable Growth and Transfer of Mono layer MoS2 on Au Foils and Its Potential Application in Hydrogen Evolution Reaction
Controllable Growth and Transfer of Mono layer MoS2 on Au Foils and Its Potential Application in Hydrogen Evolution Reaction
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金箔上单层MoS2的可控生长和转移及其在析氢反应中的潜在应用
DOI：
10.1021/nn503211t
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发表时间：
2014-10-01
期刊：
影响因子：
17.1
通讯作者：
Liu, Zhongfan
中科院分区：
文献类型：
--
作者：
Shi, Jianping;Ma, Donglin;Liu, Zhongfan
单层MoS_2的可控合成是实现MoS_2在光电子学、电子学等方面的应用潜力的关键.本文报道了用低压化学气相沉积方法在商业金箔上生长高质量、磁区尺寸可调(边缘长度从200 nm到50微米)、严格的单层MoS_2薄片甚至完整的薄膜.生长的MoS2样品可以被转移到任意的衬底上，如SiO_2/Si和石英，并且完美地保持了晶体质量，因此可能有利于其广泛的应用。特别值得注意的是，Au表面的纳米三角MoS_2片被证明是优良的析氢电催化剂，具有较低的Tafel斜率(61 mV/十)和较高的交换电流密度(38.1µA/cm(2))。MoS_2和Au薄膜之间良好的电子耦合被认为是解释了异常的析氢反应活性的原因。我们的工作报道了在引入金属箔作为衬底的情况下合成单层MoS_2，并提供了证据，证明在精选的电极上组装的单层MoS_2可以表现出与纳米颗粒或少层MoS_2电催化剂相当的析氢反应性能。
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 similar to 200 nm to 50 mu 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 mu A/cm(2)). 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.