Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
Collaborative Innovation Center of Extreme Optics, Shanxi University , Taiyuan, Shanxi 030006, China.
ACS Appl Mater Interfaces. 2017 Dec 6;9(48):42139-42148. doi: 10.1021/acsami.7b14957. Epub 2017 Nov 17.
As a typical transition-metal dichalcogenides, MoS has been a hotspot of research in many fields. In this work, the MoS nanosheets were compounded on 1T-VS nanoflowers (VS@MoS) successfully by a two-step hydrothermal method for the first time, and their hydrogen evolution properties were studied mainly. The higher charge-transfer efficiency benefiting from the metallicity of VS and the greater activity due to more exposed active edge sites of MoS improve the hydrogen evolution reaction performance of the nanocomposite electrocatalyst. Adsorption and transport of an intermediate hydrogen atom by VS also enhances the hydrogen evolution efficiency. The catalyst shows a low onset potential of 97 mV, a Tafel slope as low as 54.9 mV dec, and good stability. Combining the electric conductivity of VS with the physicochemical stability of MoS, VS@MoS also exhibits excellent humidity properties.
作为一种典型的过渡金属二硫化物，MoS 在许多领域的研究中一直是热点。在这项工作中，首次通过两步水热法成功地将 MoS 纳米片复合在 1T-VS 纳米花上（VS@MoS），并主要研究了其析氢性能。VS 的金属性有利于更高的电荷转移效率，MoS 更多暴露的活性边缘位点使其具有更高的活性，从而提高了纳米复合材料电催化剂的析氢反应性能。VS 对中间氢原子的吸附和传输也提高了析氢效率。该催化剂具有低的起始电位 97 mV，低至 54.9 mV dec 的 Tafel 斜率，以及良好的稳定性。结合 VS 的电导率和 MoS 的物理化学稳定性，VS@MoS 还表现出优异的湿度性能。
