MoS2 Nanosheets: A Designed Structure with High Active Site Density for the Hydrogen Evolution Reaction
MoS2 Nanosheets: A Designed Structure with High Active Site Density for the Hydrogen Evolution Reaction
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DOI：
10.1021/cs400384h
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发表时间：
2013-09-01
期刊：
影响因子：
12.9
通讯作者：
Wilkinson, David P.
中科院分区：
文献类型：
--
作者：
Wu, Zhuangzhi;Fang, Baizeng;Wilkinson, David P.
通过微区反应方法设计了具有高活性中心密度的二维MoS 2纳米片（NS）用于析氢反应（HER）。研究了退火温度对MoS 2纳米结构和HER性能的影响，并探讨了MoS 2纳米结构与HER性能之间的关系。在550 ℃下获得的MoS 2 NS电催化剂显示出最好的HER性能，具有68 mV/dec的相对小的塔菲尔斜率。暴露的表面积和活性位点密度对于提供大量的活性位点是非常重要的。本工作已被证明是一个有效的途径，以实现高的活性中心密度和相对较大的表面积，这可能是潜在的光电催化水裂解。
Two-dimensional MoS2 nanosheets (NSs) with high active site density were designed for the hydrogen evolution reaction (HER) through a microdomain reaction method. The effect of the annealing temperature on the microstructure and the HER performance of MoS2 NSs was examined, and a plausible relation between the stack structures of the MoS2 catalysts and their HER performance was also explored. The MoS2 NS electrocatalyst obtained at 550 degrees C reveals the best HER performance with a relatively small Tafel slope of 68 mV/dec. Both the exposed surface area and active site density are very important for providing a large amount of active sites. The present work has been proved to be an efficient route to achieve a high active site density and a relatively large surface area, which might have potential use in photoelectrocatalytic water splitting.