Hydrothermal synthesis of MoS2 nanoflowers as highly efficient hydrogen evolution reaction catalysts
Hydrothermal synthesis of MoS2 nanoflowers as highly efficient hydrogen evolution reaction catalysts
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水热合成MoS2纳米花作为高效析氢反应催化剂
DOI：
10.1016/j.jpowsour.2014.04.066
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发表时间：
2014-10-15
影响因子：
9.2
通讯作者：
Liu, Zhihong
中科院分区：
文献类型：
--
作者：
Wang, Dezhi;Pan, Zhou;Liu, Zhihong
通过简单的水热方法成功合成了由层状纳米片组装的非晶MoS2纳米花。通过X射线衍射（XRD）、拉曼光谱、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对它们进行了表征，并对其作为析氢反应（HER）中的电化学催化剂进行了评估。此外，还讨论了制备温度的影响。研究发现，与商用块状 MoS2 微粒相比，这些催化剂表现出优异的 HER 活性，这是由于由层数较少的纳米片组装而成的纳米花的特殊结构，暴露出更多的活性位点并降低了固有电阻。在220℃下获得的催化剂表现出最佳的活性，具有最大的交换电流密度和最小的塔菲尔斜率（52 mV dec(-1)），这使其成为一种有实际应用前景的HER电催化剂。 (C) 2014 Elsevier B.V. 保留所有权利。
Amorphous MoS2 nanoflowers assembled by lamellar nanosheets have been successfully synthesized by a facile hydrothermal method. They were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and evaluated as electrochemical catalysts in the hydrogen evolution reaction (HER). Moreover, the effect of preparation temperature was also discussed. It was found that these catalysts exhibited excellent HER activity compared to commercial bulk MoS2 microparticles due to the special structure of nanoflowers assembled by nanosheets with few layers, exposing much more active sites and reducing intrinsic resistance. And the catalyst obtained at 220 degrees C showed the best activity with the largest exchange current density and the smallest Tafel slope of 52 mV dec(-1), which made it a promising HER electrocatalyst for practical applications. (C) 2014 Elsevier B.V. All rights reserved.